Siemens
Energy & Automation, Inc.
Installation and Service Instruction
SD39MODULNET-1
Rev: 4
February 2003
MODULNET Carrierband Network
!Notes
SD39MODULNET-1
Contents
Table of Contents
Section
Title
1.0
1.1
1.2
1.2.1
1.2.2
1.2.3
1.3
1.4
1.5
Introduction....................................................................................................................1-1
Product Description ......................................................................................................1-2
Specifications................................................................................................................1-7
Communications ....................................................................................................1-7
MODULNET Hardware ........................................................................................1-7
Environmental........................................................................................................1-9
Glossary ......................................................................................................................1-10
Product Support ..........................................................................................................1-10
Related Literature .......................................................................................................1-12
2.0
2.1
2.1.1
2.1.2
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.4.1
2.3
2.3.1
2.3.2
2.3.3
2.3.3.1
2.3.3.2
2.3.3.3
2.3.4
2.3.4.1
2.3.4.2
2.3.4.3
2.3.5
2.3.5.1
2.3.5.2
2.3.5.3
2.3.5.4
2.3.5.5
2.3.5.6
Installation......................................................................................................................2-1
Installation Considerations ...........................................................................................2-1
Trunk Cable............................................................................................................2-1
Trunk Tap...............................................................................................................2-2
MODULNET Design ...................................................................................................2-3
MODULNET Documentation................................................................................2-3
Safety Considerations ............................................................................................2-4
Procedure ...............................................................................................................2-4
MODULNET Length.............................................................................................2-7
Graphical Method.........................................................................................2-8
Tap and Cable Installation ..........................................................................................2-11
Tools and Test Equipment ...................................................................................2-11
Tap Installation ....................................................................................................2-12
Trunk Cable Installation.......................................................................................2-14
Trunk Cable Installation Procedure............................................................2-15
Trunk Cable Fabrication Procedure ...........................................................2-18
M-NET Cable Recommendations ..............................................................2-23
Drop Cable Installation ........................................................................................2-24
Drop Cable Installation Procedure .............................................................2-24
Drop Cable Fabrication Procedure .............................................................2-25
M-NET Cable Recommendations ..............................................................2-30
MODULNET Testing ..........................................................................................2-31
Trunk Return Loss Measurement ...............................................................2-31
Trunk Noise Level Measurement ...............................................................2-32
Drop Cable-to-Tap Return Loss Measurement ..........................................2-33
Drop Cable Noise Level Measurement ......................................................2-33
Signal Level Measurement.........................................................................2-33
Cable Sealing and Boots ............................................................................2-36
3.0
Circuit Description ........................................................................................................3-1
4.0
4.1
4.2
4.3
Maintenance ...................................................................................................................4-1
Tool and Equipment Requirements ..............................................................................4-1
Visual Inspection ..........................................................................................................4-1
MODULNET Troubleshooting ....................................................................................4-2
February 2003
Page
i
Contents
SD39MODULNET-1
4.3.1
4.4
4.5
4.6
4.7
Advance Diagnostics Techniques Beyond this checklist.......................................4-5
MODULNET Testing...................................................................................................4-6
Tap or Cable Segment Replacement.............................................................................4-7
Spare and Replacement Parts........................................................................................4-7
Return of Shipment.......................................................................................................4-7
List of Tables
Table
Title
Page
Table 1–1 MODULNET Hardware ..........................................................................................................1-1
Table 1–2 MODULNET Accessories .......................................................................................................1-1
Table 1–3 TIC Contact Information........................................................................................................1-11
List of Illustrations
Figure
Title
Page
Figure 1–1 MODULNET Local Area Network ........................................................................................1-3
Figure 1–2 MODULBUS Expander Module and Transition Board .........................................................1-5
Figure 1–3 MODULNET Redundancy.....................................................................................................1-6
Figure 2–1
Figure 2–2
Figure 2–3
Figure 2–4
Figure 2–5
Figure 2–6
MODULNET Taps .................................................................................................................2-5
MODULNET Length vs. Number of 2-Port Taps..................................................................2-9
MODULNET Length vs. Number of 4-Port Taps................................................................2-10
Tap Mounting within MODULPAC.....................................................................................2-13
F-Male Connectors for RG-6 and RG-11 Cables .................................................................2-17
Network Signal Level Analysis Example.............................................................................2-35
Significant Changes for Revision 4
2.3
ii
Tap and Cable Installation—Addition of trunk cable and drop cable fabrication procedures.
February 2003
SD39MODULNET-1
1.0
Introduction
Introduction
This manual provides installation and service information for MODULNET hardware and accessories as
listed in Table 1-1 and Table 1-2 below.
Table 1–1 MODULNET Hardware
Part Number
Description
14753-1
Trunk Cable Tap, 2 Port
14753-3
Trunk Cable Tap, 4 Port
14753-2
F-Type 75 Ohm Terminator
W2077
RG-6 Drop Cable (length specified by user)
16056-440
RG-11 Trunk Cable (200 meter reel)
16056-441
RG-11 Trunk Cable (400 meter reel)
16056-442
RG-11 Trunk Cable (800 meter reel)
Table 1–2 MODULNET Accessories
February 2003
Part Number
Description
14784-501
F-Type Connector, RG-11 (one connector)
14784-500
F-Type Connector, RG-6 (one connector)
15753-2
F-Type Precision Terminator, 75 Ohms (one terminator)
16137-68
MNET A Drop Cable with Dropsaver, 19.7 Ft (6 M)
16137-69
MNET B Drop Cable with Dropsaver, 19.7 Ft (6 M)
16056-411
Dropsaver F Connector Protector
16056-371
MNET 2-Port Tap Kit (with mounting brackets and
terminators)
16056-372
MNET 4-Port Tap Kit (with mounting brackets and
terminators)
16056-438
MNET RG-6 Drop Cable Kit (with connector sealing boots,
dropsavers, 163 Ft/50 Meter RG-6 cable, and Instructions)
16056-374
MNET RG-11 Connector Kit (with connector sealing boots,
dropsavers, cable markers, and Instructions)
16056-378
MNET Cable Preparation Tool Kit (with RG-6 and RG-11
connector crimping tools)
16056-377
Tap Support Bar (mounting base for tap mounting bracket)
16056-318
Tap Mounting Bracket (for mounting taps in a cabinet)
16056-660
25 in-lb Torque Wrench
1-1
Introduction
SD39MODULNET-1
This Instruction is divided into four major sections:
Section 1, IntroductionProvides a list of hardware, cables, and accessories, a brief product description,
specifications, and a glossary of terms.
Section 2, InstallationFurnishes hardware selection considerations, MODULNET design parameters,
cable installation and test procedures, hardware identification and installation procedures.
Section 3, Circuit DescriptionContains a brief description of the MODULNET.
Section 4, MaintenanceConsists of preventive maintenance and troubleshooting procedures, hardware
removal and replacement references, and recommendations for spare and replacement parts.
1.1
Product Description
A MODULNET is a carrierband network that permits plant-wide expansion of the APACS+ redundant
MODULBUS, interconnecting Local Area Systems* (LAS) over short or long distances. A
MODULBUS Expander Module (MBX) and an MBX transition board must be installed in a
MODULRAC at each Local Area System.
A MODULNET is installed when the local MODULBUS in a Local Area System is to be interconnected
with the local MODULBUS in another Local Area System. This permits the exchange of process data
and process control commands.
Figure 1-1 is an illustration of a redundant MODULNET interconnecting three Local Area Systems in
three separate plant areas. Each Local Area System is represented by an MBX and an MBX Extended
Transition Board. MNET A is at the top of the figure, MNET B at the bottom.
Each MNET (A or B) is independent and bi-directional. It consists of coaxial trunk and drop cables, taps,
port terminations, end-of-trunk terminations, and the MODULBUS (A and B) in each LAS. The trunk
cable connects to drop cables through nondirectional, passive, impedance-matching taps. A drop cable
connects to an MBX transition board.
1-2
February 2003
SD39MODULNET-1
Introduction
Figure 1–1 MODULNET Local Area Network
February 2003
1-3
Introduction
SD39MODULNET-1
Figure 1–2 shows an MBX and the MBX transition board.
An MBX communicates with other MBXs on a MODULNET by sending and receiving MODULBUS
communications across the redundant MNET. When an MBX and its transition board are installed in a
MODULRAC, the transition board's Module Connector and the MBX's bottom connector (on its rear
panel) are mated. Communication signals flow to and from the MODULNET through this mated pair.
The MBX's top connector (also on its rear panel) mates with a connector on the MODULRAC backplane
for access to the MODULBUS. The MBX has two independent channels to transfer information between
the MODULBUS and the MODULNET.
A System Node Address (SNA) must be assigned to each MBX so that communications can be addressed
to it. Rotary switches in the MBX bezel compartment are set to assign an SNA.
As shown in Figure 1–3, rack-to-rack and module-to-module redundancy are available.
•
Rack-To-Rack Redundancy - Two MODULRACs are involved, each with an MBX. The racks must
be identical with respect to module selection and slot location. Different System Node Addresses are
assigned to the two MBXs. MNET A and MNET B are connected to both MBXs.
•
Module-To-Module Redundancy - One MODULRAC is involved with two MBXs installed in
adjacent slots. They are assigned the same System Node Address. One MBX will service
MODULNET A and the other MODULNET B. The unused side of each MBX will not be connected
to the MODULNET.
*In this Instruction, the term Local Area System includes Unit Controllers.
1-4
February 2003
SD39MODULNET-1
Introduction
Figure 1–2 MODULBUS Expander Module and Transition Board
February 2003
1-5
Introduction
SD39MODULNET-1
Figure 1–3 MODULNET Redundancy
1-6
February 2003
SD39MODULNET-1
1.2
Introduction
Specifications
1.2.1
Communications
Local Area Network (MODULNET)
IEEE 802.4 (Carrierband)
Network Capacity
64 nodes (0 through 63)
Signal
Direct Encoded Data
Signal Modulation
Phase Coherent FSK Signal
Protocol
Deterministic Token Passing
Data Rate
5 Mbps
MBX to MODULNET Connection
Non-Directional Tap
1.2.2
MODULNET Hardware
W2077 Drop Cable
Type
RG-6 Carrierband Network Cable IEEE 802.4
Impedance
75 Ohms +/-2 Ohms
Signal Attenuation (5 Mhz)
2.16 dB/100 meters
0.66 dB/100 feet
Signal Attenuation (10 Mhz)
2.52 dB/100 meters
0.77 dB/100 feet
Transfer Impedance
10 milliohm/meter Max.
Conductor Size
18 AWG solid
Shielding
Quad (4) Shields
Maximum Pulling Tension
45 lbs. (20.4 kg.)
Bend Radii
3.0 inches
Pulling Limit
45 lbs. (20.4 Kg)
W2078 Standard Trunk Cable
Type
RG-11 Carrierband Network Cable IEEE
802.4
Impedance
75 Ohms +\-2 Ohms
Signal Attenuation (5 Mhz)
0.89 dB/100 meters
0.27 dB/100 feet
Signal Attenuation (10 Mhz)
1.21 dB/100 meters
0.37 dB/100 feet
Transfer Impedance
10 milli-ohm/meter Max.
February 2003
1-7
Introduction
SD39MODULNET-1
Conductor Size
14 AWG solid
Shielding
Quad (4) Shields
Structural Return Loss
26 dB (5 to 450 Mhz)
Cable Jacket Band Marks
Every 2.6 meters (8.5 ft.)
Maximum Pulling Tension
150 lbs. (68.1 kg)
Bend Radii
7.0 inches
Minimum Length
2.6 meters (8ft 6 in)
Pulling Limit
150 lbs. (68.1 Kg)
Armored Trunk Cable
Type
Armored RG-11 Carrierband Network Cable
IEEE 802.4
Impedance
75 Ohms +\-2 Ohms
Signal Attenuation (5 Mhz)
1.14 dB/100 meters
0.35 dB/100 feet
Signal Attenuation (10 Mhz)
1.48 dB/100 meters
0.45 dB/100 feet
Transfer Impedance
0.8 milliohm/meter Max.
Conductor Size
14 AWG solid
Shielding
Quad (4) Shields
Armor
1 (Steel or Aluminum)
Structural Return Loss
26 dB (5 to 450 Mhz)
Cable Jacket Band Marks
Every 2.6 meters (8.5 ft.)
Bend Radii
10 times od (outside diameter)
NOTE
Avoid runs of multiple of 45 to 55 feet (1/4 wave = 49.2 ft.)
Carrierband Tap
1-8
Type (Hi-Rel)
Hi-Rel Industrial Grade IEEE 802.4 Standard
& MAP Carrier- band Tap
Drop Ports
2 or 4 Ports
Drop-to-Trunk Port Attenuation
20 dB +\-0.5 dB
Trunk-to-Drop Port Attenuation
20 dB +\-0.5 dB
Drop-to-Drop Isolation
30 dB Min.
Trunk Insertion Loss (2-port tap)
0.3 dB Max.
February 2003
SD39MODULNET-1
Introduction
Trunk Insertion Loss (4-port tap)
0.45 dB Max.
Impedance, all ports
75 Ohms
Surge Protection, each port
Gas Discharge Surge Protector
Pin Connector Finish
Gold Plated
Trunk Cable Isolation
Trunk cable segments MUST be connected
between the non-isolated (grounded) trunk
port (T2) and the isolated port (T1) of 2 taps
(e.g., T1 connect to T2).
Operating Temperature
-40°C to +84°C (-58°F to +183°F)
Connectors
Type
F-Series Industrial Grade, EIA FD Standard
550 Cable-end male
Contact Finish
Gold Plated
Terminator
Type
Precision F Type
Return Loss
40 dB min. @ 10 Mhz.
Nominal Impedance
75 Ohms
Contact Finish
Gold Plated
1.2.3
Environmental
Operating Temperature
0° to 60°C (32° to 140°F)
Storage Temperature
0° to 85°C (32° to 185°F)
Humidity Range
5 to 95% Non-Condensing
IMPORTANT
The MODULNET is a high performance digital data link for which the
cables and hardware listed in section 1 and described above are highly
recommended. Any substitutes MUST BE ELECTRICALLY
EQUIVALENT and meet the IEEE 802.4 specifications for carrierband
service. Failure to use proper cables and hardware can result in erratic
MODULNET performance.
February 2003
1-9
Introduction
1.3
SD39MODULNET-1
Glossary
The following are definitions of terms used in this Instruction:
Attenuation - The reduction of a signal's level as it travels along a cable. (Expressed as a relative value
in dB.)
Baseband - A type of cable network that supports only one signal at a time.
Carrierband - A type of baseband network used in the factory. The MODULNET is a carrierband
network.
Drop Cable - The cable connecting the tap to the MODULBUS Expander Module.
Frequency Shift Keying (FSK) - The carrierband signaling method. Binary ones are one cycle of 5
Mhz; binary zeros are two cycles of 10 Mhz.
Insertion Loss - The amount of loss of the signal passing through a tap on the trunk cable. (Expressed as
a relative value in dB.)
Nondirectional - Signal from the drop cable splits equally in both directions from a tap onto the trunk
cable.
Return Loss - The amount of signal reflected from a cable impedance discontinuity.
Tap - A passive non-directional impedance matching device for connecting the MBX to the
MODULNET (trunk cable).
Termination - A device which absorbs signals at the end of a trunk cable.
1.4
Product Support
Product support can be obtained from a Technical Support Center (TSC). Each regional TSC is a
customer service center that provides direct telephone support on technical issues related to the
functionality, application, and integration of all products supplied by Siemens. Regional TSC contact
information is provided in Table 1–3. Your regional TSC is the first place you should call when seeking
product support information. When calling, it is helpful to have the following information ready:
•
Caller name and company name
•
Product part number or model number and version
•
If there is a problem with product operation:
-
1-10
Whether the problem is intermittent
The steps performed before the problem occurred
Any error messages or LED indications displayed
February 2003
SD39MODULNET-1
-
Introduction
Installation environment
Customers that have a service agreement (ServiceSuite or Field Service Agreement) are granted access to
the secure area of our Web site (http://www.smpa.siemens.com/TechServices/TechLibrary.asp). This area
contains a variety of product support information. To log on, you will be prompted to enter your
username and password.
Table 1–3 TSC Contact Information
TSC
NORTH AMERICA
Tel:
+1 215 646 7400, extension 4842
Fax:
+1 215 283 6343
E-mail:
Hours of Operation:
Secure Web Site:
TSC
ASIA
www.sea.siemens.com/process/product/papao.html
+011 65 740 7818
Fax:
+011 65 740 7817
E-mail:
Secure Web Site:
[email protected]
8:30 a.m. to 5:30 p.m. Singapore time
Monday – Friday (except holidays)
www.siemens.com
Tel:
+44 (0) 1905 450930
Fax:
+44 (0) 1905 450931
E-mail:
Hours of Operation:
Secure Web Site:
February 2003
8 a.m. to 5 p.m. eastern time
Monday – Friday (except holidays)
Tel:
Hours of Operation:
TSC
EUROPE
[email protected]
[email protected]
8:30 a.m. to 4:30 p.m. GMT/BST
Monday – Friday (except holidays)
www.siemens.com
1-11
Introduction
1.5
SD39MODULNET-1
Related Literature
The following Instructions should be available for reference during a MODULNET installation.
•
MODULBUS Expander Module Installation and Service Instruction
(document number SD39MBX-1)
•
MODULPAC Installation and Service Instruction (document number SD39MODULPAC-1)
•
MODULRAC Installation and Service Instruction (document SD39MODULRAC-1)
•
ANSI/IEEE 802.4, 1990, Token Passing Bus Access Method and Physical Layer Specifications; a
copy can be obtained from the following addresses:
U.S.A.: American National Standards Institute
Attn: Customer Service
11 West 42nd Street
New York, NY 10036
Phone Orders: 212-642-4900
Europe: ISO
1,Rue, De Varembe
CH-1211 Geneva 20
Switzerland/Swiss
Phone: 4122749011
"
1-12
February 2003
SD39MODULNET-1
2.0
Installation
Installation
This section describes design and installation of a redundant MODULNET including taps, terminations,
and trunk and drop coaxial cables.
Read this entire section before beginning an installation. Refer to the MODULBUS Expander Module's
Installation and Service Instruction (document number SD39MBX-1) as necessary during the installation.
2.1
Installation Considerations
Before beginning to install MODULNET hardware, complete the following:
1. System Layout
Design the MODULNET cable-system (see section 2.2) and select MODULNET hardware (refer to
section 1.0 , section 1.3, and section 2.1.1 in this Instruction and the MODULBUS Expander Module
Instruction).
Avoid areas containing environmental contaminants that could damage cables. If this is not possible,
use installation techniques to control contamination.
2. Install taps (see sections 2.1.2 and 2.3.2).
3. Prepare and install trunk cables (see section 2.3.3).
4. Prepare and install drop cables (see section 2.3.4).
5. Test installed MODULNET (see section 2.3.5)
6. Refer to MODULBUS Expander Module Installation and Service Instruction to connect drop cables
and set MNET A and B switches.
2.1.1
Trunk Cable
Trunk cable specifications are listed in section 1.2. Cable is available in flexible and armored versions.
Flexible cable is used in most installations, however, armored cable has advantages and disadvantages, as
discussed later in this section.
For a Superior Installation:
•
Use a high quality cable designed for IEEE 802.4 carrier band service from one manufacturer for the
entire trunk to maintain constant impedance between cable segments. Prior to shipment, have the
manufacturer test the cable to ensure that it meets attenuation specifications and that concealed
(internal) discontinuities that can cause reflections do not exist.
-
Structural Return Loss from both cable ends: Loss should be -26 dB or better.
February 2003
2-1
Installation
-
SD39MODULNET-1
Cable attenuation: Refer to the manufacturer's specification for the length of cable on the reel.
The attenuation is measured at 10 Mhz.
The cable manufacturer should provide a test document with each reel of cable listing the following:
-
Manufacturer's Lot Number
Cable Attenuation @ 5 and 10 MHz.
Structural Return Loss
Tilt per Distance
Cable Impedance
Group Delay Distortion
Maximum Cable Length
The maximum cable length is an important cable parameter. It specifies the maximum length the
cable can be and remain within the IEEE Standard 802.4 specification.
Pretested RG-11 trunk cable can be ordered from Siemens. See Table 1–1.
•
All segments of trunk cable for MNET A, or for MNET B, should come from one reel. If more than
one reel is required to fabricate the entire A or B trunk, use a reel from the same lot (same extruder at
the same time of manufacture).
It is the extruder-to-extruder differences that create slightly different characteristic impedances which
cause unwanted signal reflections.
•
Splicing a trunk cable segment is not recommended for a new installation.
Armored Cable Advantages and Disadvantages:
•
Superior protection from factory electrical noise. Its higher transfer impedance is indicative of its
ability to reject unwanted shield currents.
•
Can be buried without installation in conduit.
•
Can be hung between poles separated by up to 150 feet (46 meters) without the need for messenger
wire support.
•
Protected against moisture and physical damage.
•
More complex installation. For example, it must be formed to make bends and turns.
•
Requires grounding of the armor for lightning protection and additional noise immunity.
2.1.2
Trunk Tap
This section discusses tap mounting locations and methods. Figure 2–1 shows 2-port and 4-port taps.
2-2
February 2003
SD39MODULNET-1
Installation
NOTE
Taps are known as 2-port and 4-port taps. This refers to the number of
drop ports. Both taps also have two trunk ports.
Each tap will have connected to it one or two trunk cables and one to four drop cables. The taps at each
end of an MNET must have a 75 ohm termination installed in the trunk port that is not connected to a
trunk cable. Unused drop ports must also be terminated.
NOTE
All Taps must be grounded by connecting the tap’s ground lug to a
ground point. Do not float tap.
Two taps are needed for a Local Area System to connect to a redundant MODULNET. They can be
mounted either inside a cabinet housing an MBX or external to the cabinet.
External Tap:
At each Local Area System (LAS), mount the taps as close as possible to the cabinet housing the MBX to
minimize drop cable length. Mount the taps with user supplied hardware.
When the trunk cable is aerially suspended and a tap is suspended in mid-air, provide a messenger cable
for support and cable strain relief to prevent axial cable loads at the tap connections.
Internal Tap:
MNET 2-Port and 4-Port Tap Kits (seeTable 1–2) include a tap mounting bracket for the rail mounting of
taps in a MODULPAC cabinet. A mounting instruction is included in each kit.
Mounting a tap internally yields the shortest drop cable which can permit additional taps or a longer
trunk. This may be offset by the additional trunk cable often needed to reach the internally mounted tap.
2.2
MODULNET Design
The design of the MODULNET (MNET) requires consideration of a number of parameters, including
safety, environment, number of taps, and trunk and drop cable lengths. The following sections discuss
these and other topics.
2.2.1
MODULNET Documentation
Network documentation should be created during the design phase. The documentation can be used by
cable system installers to route the cable, install and mark taps, and compare calculated signal values with
measured values. It will also assist in visualizing the installation during the design phase and provide a
reference for servicing the network and for future additions to the network.
A permanent record of the network's physical structure and performance characteristic should include the
following:
February 2003
2-3
Installation
-
SD39MODULNET-1
Trunk and drop cable routes
Length of each trunk and drop cable segment
Trunk cable segment identifier (ID) and drop cable ID (including cabinet ID and MODULRAC slot
number of the MBX to which it connects)
Each tap type and ID
Calculated trunk port SIGNAL IN/OUT level at each tap
Calculated drop port SIGNAL IN (to MBX) level at each tap
Measured return loss value of finished trunk
2.2.2
Safety Considerations
The installation should include the following safety considerations:
IMPORTANT
The installation must comply with the National Electrical Code and all
other applicable construction and electrical codes.
1. Physically isolate MODULNET components from all power or lighting circuits.
2. Properly ground all MODULNET taps to provide for:
•
The dissipation of static charges in MODULNET cables.
•
The shunting to ground of high-energy transients (surge protection)
3. Ensure that safety grounds to which various MODULNET components are connected are at the same
electrical potential.
2.2.3
Procedure
This section contains a series of steps for designing a MODULNET that will meet IEEE 802.4
specifications.
IMPORTANT
MNET A and B must have the same number of taps and MBXs, although
trunk lengths can be different if they are within the limits of the IEEE
802.4 specifications
2-4
February 2003
SD39MODULNET-1
Installation
Figure 2–1 MODULNET Taps
1. Refer to the user documentation listed in section 1.5, Related Literature, for information regarding
proposed MODULNET requirements.
•
Note the location of each Local Area System (LAS) and the location of each cabinet that will
house an MBX.
February 2003
2-5
Installation
SD39MODULNET-1
An MBX and transition board (or redundant MBXs and transition boards) must be installed at
each LAS.
•
Note module-to-module and rack-to-rack redundancy requirements. See Figure 1–3.
Module-to-Module Redundancy - One MBX will service MNET A and the other MNET B. The
unused A or B side of each MBX is turned off.
Rack-to-Rack Redundancy - Completely duplicates the MBX, control, and I/O module subsystem
for maximum availability. Both MBXs are connected to MNET A and B.
2. Determine the location of each 2-port and 4-port tap and record the number of taps required and the
estimated length of each drop cable.
•
If the plant already exists, determine the tap locations and estimate and record the length of the
associated drop cables.
•
If the plant is being designed, tap locations and estimated drop cable lengths should be specified
as an installation drawing.
•
Include extra taps for future Local Area Systems additions.
•
Provide ports for test points at critical locations on the network, for example, at each end of the
trunk cable, where the trunk cable enters an inaccessible area, and where a trunk cable enters or
leaves a building.
•
Select a cable routing medium (e.g., conduit, raceway, trough) for trunk and drop cables.
3. Determine the maximum allowable end-to-end trunk length. Refer to section 2.2.4 for a the graphical
and calculation methods. Then return to step 4 below.
4. Estimate the length of each between-taps trunk cable segment.
•
Estimate as accurately as possible the length of each trunk cable segment. Refer to plant
drawings.
The sum of all cable segments must be equal to or less than the total allowable end-to-end trunk
cable length.
•
Each trunk cable segment must be installed in increments of 8 ft. 6 in. (2.6 meters) which are
clearly marked by bands on the cable's outer sheath. Note the following:
-
Minimum trunk cable segment: 8 ft. 6 in. (2.6 meters)
-
Maximum trunk cable segment: The maximum trunk cable segment length is a function of
the end-to-end trunk length and number of taps between cable segments.
5. Determine secure routes for MNET A and MNET B cables from tap to tap.
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SD39MODULNET-1
Installation
•
To improve system reliability, MNET A and MNET B should follow separate routes between
taps so that a single accident will be unlikely to damage both cables. A secure route is one that
also eliminates or minimizes induced noise which can degrade system reliability.
•
Use a direct route whenever possible to minimize trunk cable length. Estimate and record the
length of each segment (i.e., each length between two taps).
•
Select a suitable passage medium (conduit, flexible armor, cable trays, aerial post-to-post, etc.) to
accommodate the trunk cables.
6. Compare the estimated sum of trunk cable segment lengths from step 4 with the maximum allowable
end-to-end trunk length determined from step 3.
The estimated end-to-end trunk lengths of MNET A and MNET B must be less than or equal to the
maximum allowable trunk length.
IMPORTANT
If the estimated trunk length exceeds the maximum allowable trunk
length, consult a Siemens engineer for options to extend trunk length.
2.2.4
MODULNET Length
The MODULNET must be within the length determined in this section to ensure reliable
communications.
MODULNET maximum length is affected by:
•
Trunk and drop cable signal attenuation
•
The number of 2-port and 4-port taps and the signal attenuation caused by these taps
The MODULNET maximum length for the needed number of taps can be determined by either of two
methods:
•
Graphical Method: Estimated from the graphs in Figure 2–2 and Figure 2–3.
•
Calculation Method: Calculated by a formula provided in Appendix A. The formula describes the
relationship between trunk cable length, the number and type of taps, and the length of drop cables.
The formula must be used when the MODULNET consists of a mixture of 2-port and 4-port taps
excluding the end-of-trunk taps.
Section 2.2.4.1 describes the use of the graphs to determine the number of allowable taps versus a given
MODULNET length or vice versa.
February 2003
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SD39MODULNET-1
2.2.4.1 Graphical Method
The graphs in Figure 2–2 and Figure 2–3 are applicable to MODULNETs consisting of only 2-port or 4port taps.
The graphs were generated using the formula in Appendix A and the cable and tap specifications in
section 1.2.
The number of allowable taps per MODULNET length shown in the graphs EXCLUDES both end-oftrunk taps and represents the number of taps allowed between the end-of-trunk taps.
IMPORTANT
End-of-trunk taps can be of the same type or one of each type. The type
of end-of-trunk taps used is independent of the composition of the
intervening taps.
Several examples show use of the graphs. While the examples refer to Figure 2–2, the 4-port graph in
Figure 2–3 is used identically.
Read the graphs carefully to avoid errors which could result in a poorly performing MODULNET.
Example 1: Find the maximum allowable MODULNET trunk length.
Known:
Longest (estimated) Drop Cable = 120 Ft.
Total Taps = 14
Tap Type = 2-port
1. Figure 2–2 (2-port tap graph) is applicable to this example.
2. Since the graph excludes the two end of trunk taps, subtract 2 from the total number of taps (14).
3. Find curve E for the 130 ft. drop cable.
4. Locate on the horizontal NUMBER OF 2-PORT TAPS scale the point for 12 taps. Follow the
vertical line to curve E.
5. From the above point on curve E, move horizontally to the MODULNET LENGTH scale to read the
allowable MODULNET length. For this example, the MODULNET length is an estimated 1725 feet.
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February 2003
SD39MODULNET-1
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Figure 2–2 MODULNET Length vs. Number of 2-Port Taps
February 2003
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SD39MODULNET-1
Figure 2–3 MODULNET Length vs. Number of 4-Port Taps
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SD39MODULNET-1
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Example 2: Find the maximum allowable number of 2-port taps.
Known:
MODULNET length (estimated) = 1900 Ft.
Longest (estimated) drop cable = 60 Ft.
1. Figure 2–2 (2-port tap graph) is applicable to this example.
2. Locate on the graph the intersection of the horizontal 1900 ft. line and curve C.
3. Move down vertically and read the number of allowable taps from the horizontal tap scale.
Note that the value of the tap number falls between 13 and 14 taps. Fractional numbers are rounded down
to the lowest whole number, which is in this case, 13 taps. Adding the two end-of-trunk taps (any type)
gives a total of 15 taps across the MODULNET.
Example 3: Find the allowable drop cable length.
Known:
MODULNET length = 1300 ft.
Number of taps (excluding end-of-trunk taps) = 20, 2-port taps
1. Figure 2-2 (2-port tap graph) is applicable to this example.
2. Locate on the graph the intersection of the 1300 ft. horizontal line and 20 tap vertical line - between
the C and D curves.
3. Note that the span between the C and D curves is 40 ft.
4. Estimate from the intersection of the 1300 ft. and 20 tap lines that the allowable longest drop cable
length is 75 ft.
2.3
Tap and Cable Installation
The procedures in the following subsections are for installing taps, trunk cables and drop cables. It may
be necessary to modify these procedure to accommodate the installation site, available tools and test
equipment, or local ordinances.
2.3.1
Tools and Test Equipment
Typical tools and test equipment are listed below. They are supplied by the installer.
•
Cable preparation and installation tools for RG-6 and RG-11 cable; see accessory list in Table 1–2
•
25 lb-in Torque Wrench (PN 16056-660)
•
Carrierband Network Tester
Some manufacturers of carrierband hardware offer a network tester and signal generator for field
testing to the IEEE 802.4 standard.
February 2003
2-11
Installation
SD39MODULNET-1
Frequently, a carrierband network tester can be used by cable installation personnel having no
specific electronics training. An auxiliary signal generator is used as a signal source at one end of the
trunk cable and the tester measures the signal strength and return loss along the trunk cable. This
equipment is used for the following network activities:
-
Component qualification
Installation verification
Servicing
The manufacturer of the CB Tester and Auxiliary Signal Generator (standard accessory) is:
RELCOM Inc.
Rt. 1, 244H
Forrest Grove, OR 97116, USA
•
Cable pulling grips
•
Conduit cutting and bending tools
•
Heat gun for heat-shrink tubing
•
Standard hand tools
2.3.2
Tap Installation
Mount each tap either within the cabinet housing the MBX or external to the cabinet.
1. Refer to system documentation for the quantity of each type of tap (2-port or 4-port) to be installed
and for mounting locations. Taps, Installation Instructions, and mounting hardware are provided in
each Tap Mounting Kit.
External Mounting - Refer to Figure 2–1 for tap mounting dimensions and fabricate mounting
brackets.
Internal Mounting - Refer to Figure 2–4 and the Tap Mounting Kit Instructions to mount the taps.
2. Install taps in pairs at their selected locations, one each for MNET A and B. Typically, begin at an
end-of-trunk tap and proceed along the trunk to the opposite end-of-trunk tap. Tag every tap with its
number and MNET A or B ID.
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SD39MODULNET-1
Installation
Figure 2–4 Tap Mounting within MODULPAC
3. External Mounting - Install a 14 gauge (AWG) wire between the tap's ground stud and building safety
ground. Do not rely on building structure, conduit, or messenger cable to complete the ground path.
4. At each tap, install a 75 ohm Terminator on each port that will not receive either a trunk or tap cable,
to maintain proper network impedance.
5. At each tap's trunk ports, provide cable strain relief so the trunk cable does not put a stress on the tap
trunk port.
February 2003
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Installation
2.3.3
SD39MODULNET-1
Trunk Cable Installation
Trunk cable installation consists of routing and installing cable segments between successive taps until all
cable segments comprising the cable-system are installed. Pull each cable through conduit or lay it in
cable trays at an appropriate point in the installation procedure provided below.
The following is applicable to both MNET A and B trunks:
•
Refer to user's MODULNET documentation and the results of the MODULNET design in section 2.2
for trunk and tap cable routing, cable lengths, tap locations, MBX slot locations and other needed
information.
•
Do not exceed the manufacturer's trunk cable pulling force during installation, especially when
pulling cable through conduit. W2078 cable has a pulling limit of 150 lbs (68.1 kg).
•
Do not bend a cable around sharp corners. A trunk cable has a minimum bend radius of 17.75 cm
(7.0 inches).
•
For aerial suspension, the maximum unsupported cable length for standard RG-11 cable is 100 feet
(30.5 m) and for armored RG-11 cable 150 feet (45.7 m). If longer distances are required, use
messenger wires.
•
Trunk cable can be laid in a cable tray or trough, or secured to polls, walls, or building structural
members. Do not crush the trunk cable with attachment devices.
•
Route trunk and drop cables away from plant areas with electromagnetic/electrical fields that might
interfere with MODULNET communications. Such areas may contain electric arcs, high current
electrical equipment which emit strong electromagnetic fields and switching transients, welding
operations, or electrical motors turning on and off.
•
Armored RG-11 trunk cable requires grounding of the armor for lightning protection and additional
noise immunity. Ground the armor in as many places (two places minimum) between taps as possible
with a 14 AWG conductor to safety ground. Do not ground the armor to the taps or to the cable's
inner shields. Use ground clamps designed for armor cable to make these connections.
•
Make sure that all MNET taps are cabled from T1 on the first tap to T2 on the next tap (not T1 to T1
or T2 to T2). Mnet uses a segmented ground for the coaxial cable. The trunk port labeled ‘T2’ is
grounded. The ‘T1’ port is isolated from ground. Connecting both ends of a cable segment to T!
ports fails to ground the cable. Connecting both ends to T2 ports creates a ground loop.
•
Strain-relieve all MNET/MBUS cables. Replace any cables with signs of connector damage. (See
MNET Kit Instructions 15900-553 and -554). Excess force on the cables can result in cable or
connector failure
•
Verify that the entire APACS+ system is properly grounded (See Installation and Service Instruction
SD39GND-1). Improper grounding can cause ground loops, which can cause noise.
•
Avoid runs in multiple of 45 to 55 ft. (1/4 wave = 49.2 ft.)
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February 2003
SD39MODULNET-1
Installation
2.3.3.1 Trunk Cable Installation Procedure
1. Refer to MODULNET documentation and the results of the MODULNET design in section 2.2 for
cable length between the first and second taps on MNET A.
Include some extra cable for connector installation and future servicing.
2. Route the trunk cable between selected taps.
3. Cut cable to desired length.
4. Refer to Figure 2–5 and the section, Trunk Cable Fabrication Procedure, to attach F-male connectors
to both ends of the cut trunk cable. Use a crimping tool recommended by the connector
manufacturer.
Tag each end of the trunk cable segment with its segment number and its MNET A or B ID.
5. Remove the rubber gasket from all MNET terminators (Service Note SN39MNET-1).
6. Completely remove any MNET terminator and chain from the T1 side of the taps before installing the
cable. If the dangling terminator touches any grounded object, it can cause a ground loop by
grounding the isolated tap trunk port, T1.
NOTE
Lubricate all MBUS/MNET connections of all connectors (Kit
Instruction 15900-394, included with the lubricant kit, P/N 14850-121).
Lubrication protects the contacts from harsh environments and fretting
corrosion.
7. Use a proper torque wrench to tighten coaxial connectors (cables and terminators) Use P/N 16056660, 25 in.-lb. torque wrench for cables, included in Tool Kits 16056-652 and 16056-653) If a proper
torque wrench is not immediately available, approximate 25 in.-lb. by finger tightening, plus 1/8 turn
for connectors and terminator without gaskets.
Be sure to relieve any strain the cable may exert on the connector while tightening. Insufficient
torque can result in a poor connection; excessive force can result in damage to hardware.
IMPORTANT
Each trunk cable MUST connect to an isolated trunk port (T1) on one tap
and a grounded, non-isolated trunk port (T2) on a second tap. See Figure
2-1 to identify the ports. A white dot often marks the isolated port.
Be careful not to cross-connect MNET A and MNET B.
8. Install the next MNET A trunk cable segment. Repeat the preceding steps for each cable segment
until all MNET A segments are installed, then proceed to step 9.
9. Install each MNET B trunk cable segment by repeating the above steps.
February 2003
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Installation
SD39MODULNET-1
IMPORTANT
Terminate the ends of the MODULNET with 75 ohm terminators. See
Figure 1–1. Do not connect the network ends together.
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SD39MODULNET-1
Installation
Figure 2–5 F-Male Connectors for RG-6 and RG-11 Cables
February 2003
2-17
Installation
SD39MODULNET-1
2.3.3.2 Trunk Cable Fabrication Procedure
Follow steps 1 through 9 to fabricate the cables. Detailed procedures for each step are provided.
1. Initial Cable Preparation:
Slip heat shrink over cable end. For M-NET A, use white; for M-NET B, use black.
HEAT SHRINK
RG-11 QUAD SHIELD
TRUNK CABLE
CommScope P/N 5950
COPPER-COATED STEEL
CENTER CONDUCTOR
F-CONNECTOR END
Figure 1 - Initial Cable Preparation
2. Preparing the Cable End
a. Remove 1/2 inch of the cable jacket (see Figure 2). Be careful not to cut the braid.
1
2"
Figure 2 - Remove Cable Jacket
b. Carefully fold back the outer braid over the jacket (see Figure 3).
Figure 3 - Folding Back the Outer Braid
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February 2003
SD39MODULNET-1
Installation
c. Carefully peel off the outer foil after first making a small cut at the base of the foil at the end of
the foil wrap (see Figure 4).
PEEL OUTER FOIL
SMALL CUT
Figure 4 - Removing the Outer Foil
d. Carefully fold back the inner braid over the outer braid (see Figure 5). Do not remove the inner
foil.
Figure 5 - Folding Back the Inner Braid
e. Trim the dielectric so that there is 1/8 inch protruding from the jacket (see Figure 6). Use a wirestripping tool that is notched or can be adjusted so that the center conductor does not get nicked.
Adjust the stripping tool to match the center conductor’s dimension of 14 AWG.
1
8"
Figure 6 - Trimming the Dielectric
f.
Trim the center conductor, which is 14 AWG copper-coated steel wire, so that there is only 1/8
inch protruding from the dielectric (see Figure 7).
1
8"
Figure 7 - Trimming the Center Conductor
February 2003
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Installation
SD39MODULNET-1
3. Crimping the Pin to the Center Conductor:
a. Insert the pin over the center connector so that the end of the pin is flush with the end of the
dielectric (see Figure 8).
PIN
Figure 8 - Inserting the Pin over the Center Conductor
b. Using the 0.100 hex of the Siemens Crimping Tool P/N 16056-414 (reference also Gilbert P/N GCRT-211), crimp pin to center conductor (see Figure 9).
CROSS-SECTION
OF CRIMPER JAW
Figure 9 - Crimping the Pin to the Center Conductor
4. Inserting Cable into Connector:
Perform the following procedure to insert the cable into the connector:
a. Insert the cable into the F-connector (Siemens F-connector, P/N 14784-501 (reference also
Gilbert P/N 44344) (see Figure 10).
3
32
"
GILBERT F-STYLE CONNECTOR P/N 44344
Siemens P/N 14784-501
Figure 10 - Inserting the Cable into the Connector
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February 2003
SD39MODULNET-1
Installation
b. Check to see that cable insertion is complete by determining that the pin protrudes a minimum of
3/32 in. past the end of the connector (see Figure 11). Use the F-connector pin gauge provided.
CHECK WITH
32" F-CONNECTOR
PIN GAUGE
Siemens P/N 16056-648
3
Figure 11 - Checking Cable Insertion
5. Crimping the Connector onto the Cable:
Crimp the connector onto the cable using the 0.475 hex on the Siemens Crimping Tool, P/N 16056414 (reference also Gilbert P/N G-CRT-211) (see Figure 12).
CRIMP WITH 0.475 HEX
Figure 12 - Crimping the Connector onto the Cable
NOTE
The jaws of the crimping tool must close fully to effect a good crimp. As
the jaws close, the handles can be felt to toggle over center. Make sure
that you use the entire width of the crimping tool.
February 2003
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SD39MODULNET-1
6. Sliding the Heat Shrink over the Connector
a. Slide heat shrink tubing over back of connector (see Figure 13).
b. Using heat gun, shrink tubing on connector.
HEAT SHRINK
Figure 13 - Sliding the Heat Shrink over the Connector
7. Applying the Cable Label
Apply the cable label to the approximate position shown in Figure 14.
LABEL A OR B
Figure 14 - Applying the Cable Label
8. Installing the Protective Cap
Install the protective caps onto cable ends to protect the pin during storage and handling.
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Installation
2.3.3.3 M-NET Cable Recommendations
•
Cable Strain Relief
It is recommended that all M-NET cables be strain-relieved to minimize the stress on the F connector.
This can be accomplished by ensuring that a short length of cable extending from the connector is
straight. Figure 15 illustrates acceptable and unacceptable cable stress conditions.
•
Cable Bend Radius
Excessive cable bending or kinks in cables have an effect on dielectric strength, possibly causing
communication problems. The bend radius on the RG-11 cable should be equal to or greater than
7 inches.
If it is impossible to meet the minimum cable bend radius because of limited space, it is
recommended that a right-angle, F-style adapter be employed. For maximum reliability, the adapter
should have a gold-plated pin. Adapters are available from Siemens (P/N 16056-663) or Gilbert
Engineering Co., Inc (P/N 46288).
16056-663
STRAIGHT
GOOD
GOOD
BAD
Figure 15 - Sample Cable Stress Conditions
•
Connector Tightening Torque
The proper tightening torque for an F-style connector is 20 to 30 in.-lbs. A 25in.-lb. torque wrench
(P/N 16056-660) is available in Siemens Kit P/N 16056-653. If a torque wrench is not available, first
make the connector finger-tight; then turn the connector an additional 1/8 turn clockwise with a
wrench to approximate the torque.
February 2003
2-23
Installation
2.3.4
SD39MODULNET-1
Drop Cable Installation
2.3.4.1 Drop Cable Installation Procedure
Install MNET A and B drop cables as follows.
Drop cable does not have the band marks that appear on trunk cable and may be cut to the needed length.
1. Refer to MODULNET documentation and the results of the MODULNET design in section 2.2 for
the length of each drop cable. Each cable connects to a tap drop port on MNET A or MNET B and to
a connector on an MBX transition board.
Also note or confirm the following:
•
Tap ID and location (external or internal)
•
Number of MBXs to be connected to the taps including:
•
-
The ID of all cabinets housing the MBXs and their locations.
-
The MODULRAC slot location of each MBX and its associated transition board that is
assigned to the tap's drop port "number"
Route of each drop cable and needed length
2. Route the first drop cable between the assigned tap and MBX transition board. Allow extra cable for
connector installation and future servicing.
Do not exceed the manufacturer's drop cable pulling force (45 lbs./20.4 kg.) during installation,
especially when pulling cable through conduit.
IMPORTANT
Do not bend a cable around sharp corners. A drop cable has a minimum
bend radius of 3 inches (8 cm).
3. Attach F-male connectors to both ends of each cut drop cable as shown in Figure 2–5 and in the
section, Drop Cable Fabrication Procedure. Use the crimping tool recommended by the connector
manufacturer. Tag each drop cable connector with the following:
•
Tap end of cable: Tap ID, drop port number, and MNET A or B ID.
•
Transition Board end of cable: Tap ID, MBX MODULRAC slot number, and MNET A or B ID.
Connector kits listed in Table 1–2 contain connector and cable preparation instructions which are
duplicated in section, Drop Cable Fabrication Procedure.
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February 2003
SD39MODULNET-1
Installation
4. At the tap, thread the connector onto the drop port and hand tighten. Stress relieve the cable at the
drop port and use a proper torque wrench to tighten coaxial connectors (cables and terminators). Use
P/N 16056-660, 25 in.-lb. torque wrench for cables, included in Tool Kits 16056-652 and 16056653). If a proper torque wrench is not immediately available, approximate 25 in.-lb. by finger
tightening, plus 1/8 turn for connectors and terminator without gaskets.
5. Terminate the free end of the drop cable as follows:
If an MBX transition board is installed, refer to the MBX Installation and Service Instruction (see
section 1.5 for Instruction identifier) to connect the drop cable to the MBX transition board connector.
If an MBX transition board is not installed, terminate the drop cable in a 75 ohm terminator.
6. Repeat the preceding steps for each MNET A and B drop cable.
IMPORTANT
Be careful to connect the MBX transition board's MNET A connector to
MNET A and the board's MNET B connector to MNET B.
2.3.4.2 Drop Cable Fabrication Procedure
Follow steps 1 through 9 to fabricate the cables. Detailed procedures for each step are provided.
1. Initial Cable Preparation
a. Slip ferrite bead over cable end (see Figure 1).
b. Slip heat shrink tubing (gray) over ferrite bead.
c. Use heat gun to shrink tubing over bead.
d. Slip smaller heat shrink over cable end. For M-NET A, use white; for M-NET B, use black.
HEAT SHRINK
RG-6 QUAD SHIELD
DROP CABLE
CommScope P/N 5750
FERRITE BEAD
WITH
HEAT SHRINK
COPPER-COATED STEEL
CENTER CONDUCTOR
F-CONNECTOR END
Figure 1 - Initial Cable Preparation
February 2003
2-25
Installation
SD39MODULNET-1
2. Preparing the Cable End:
a. Remove 5/16 inch of the cable jacket (see Figure 2). Be careful not to cut the braid.
5
16"
Figure 2 - Removing the Cable Jacket
b. Carefully fold back the outer braid over the jacket (see Figure 3).
Figure 3 - Folding Back the Outer Braid
c. Carefully peel off the outer foil after first making a small cut at the base of the foil at the end of
the foil wrap (see Figure 4).
PEEL OUTER FOIL
SMALL CUT
Figure 4 - Removing the Outer Foil
d. Carefully fold back the inner braid over the outer braid (see Figure 5). Do not remove the inner
foil.
Figure 5 - Folding Back the Inner Braid
e. Trim the dielectric and inner foil so that there is 3/32 inch protruding from the jacket (see Figure
6). Use a wire-stripping tool that is notched or can be adjusted so that the center conductor does
not get nicked. The center conductor is 18 AWG; adjust the stripping tool to suit.
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February 2003
SD39MODULNET-1
Installation
3
32"
Figure 6 - Trimming the Dielectric
f.
Trim the center conductor (18 AWG copper-coated steel wire) so that there is only 1/16 inch
protruding from the dielectric (see Figure 7).
1
16"
Figure 7 - Trimming the Center Conductor
3. Crimping the Pin to the Center Conductor
a. Insert the pin over the center connector so that the end of the pin is flush with the end of the
dielectric (see Figure 8).
PIN
Figure 8 - Inserting the Pin over the Center Conductor
b. Using the 0.054 hex of the Siemens Crimping Tool P/N 16056-413 (also reference: Gilbert P/N
G-CRT-188), crimp the pin to the center conductor (see Figure 9).
CROSS-SECTION
OF CRIMPER JAW
Figure 9 - Crimping the Pin to the Center Conductor
February 2003
2-27
Installation
SD39MODULNET-1
4. Inserting Cable into Connector:
a. Insert the cable into the Siemens F-connector, P/N 14784-500 (also reference Gilbert F-Style
Connector P/N 70070) (see Figure 10).
G IL B E R T F -S T Y L E C O N N E C T O R P /N 7 0 0 7 0
S ie m e n s P /N 1 4 7 8 4 -5 0 0
3
3 2" M IN
Figure 10 - Inserting Cable into Connector
b. Check to see that cable insertion is complete by determining that the pin protrudes a minimum of
3/32 in. past the end of the connector (see Figure 11). Use the F-connector pin gauge provided.
CHECK WITH
32" F-CONNECTOR
PIN GAUGE
Siemens P/N 16056-648
3
Figure 11 - Checking Cable Insertion
5. Crimping the Connector onto the Cable:
Crimp the connector onto the cable using the 0.324 hex on the Siemens Crimping Tool P/N 16056413 (reference also Gilbert P/N G-CRT-188) (see Figure 12).
CRIMP WITH 0.324 HEX
Figure 12 - Crimping the Connector onto the Cable
NOTE
The jaws of the crimping tool must close fully to effect a good crimp. As
the jaws close, the handles can be felt to toggle over center.
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SD39MODULNET-1
Installation
6. Sliding Heat Shrink over Connector:
a. Slide heat shrink tubing over back of connector (see Figure 13).
b. Using heat gun, shrink tubing on connector.
HEAT SHRINK
Figure 13 - Sliding the Heat Shrink Tubing over the Connector
7. Applying the Cable Label:
Apply the cable label to the approximate position shown in Figure 14.
LABEL A OR B
Figure 14 - Applying the Cable Label
8. Positioning the Ferrite Bead:
Slide the ferrite bead along the cable so that it is as close to the cable end as possible (see Figure 14).
9. Installing the Protective Cap:
Install the protective caps onto cable ends to protect the pin during storage and handling.
February 2003
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Installation
SD39MODULNET-1
2.3.4.3 M-NET Cable Recommendations
•
Cable Strain Relief
It is recommended that all M-NET cables be strain-relieved to minimize the stress on the F connector.
This can be accomplished by ensuring that a short length of cable extending from the connector is
straight. A good “rule of thumb” is: make sure that the section of cable between the connector and the
ferrite bead, which are on each end of most cables, is straight. Figure 15 illustrates acceptable and
unacceptable cable stress conditions.
•
Cable Bend Radius
Excessive cable bending or kinks in cables have an effect on dielectric strength, possibly causing
communications problems. The bend radius on the RG-6 cable should be equal to or greater than
3 inches.
If it is impossible to meet the minimum cable bend radius because of limited space, it is
recommended that a right-angle, F-style adapter be employed. For maximum reliability, the adapter
should have a gold-plated pin. Adapters are available from Siemens (P/N 16056-663) or Gilbert
Engineering Co., Inc (P/N 46288).
16056-663
STRAIGHT
FERRITE
BEAD
FERRITE
BEAD
FERRITE
BEAD
GOOD
GOOD
BAD
Figure 15 - Sample Cable Stress Conditions
•
Connector Tightening Torque
The proper tightening torque for an F-style connector is 20 to 30 in.-lbs. A 25 in.-lb. torque wrench
(P/N 16056-660) is available in Siemens Kit P/N 16056-652. If a torque wrench is not available, first
make the connector finger-tight; then turn the connector an additional 1/8 turn clockwise with a
wrench to approximate the torque.
2-30
February 2003
SD39MODULNET-1
2.3.5
Installation
MODULNET Testing
A carrierband tester and an auxiliary signal generator are used to perform these tests. Appendix B
contains a MODULNET Signal Log to record calculated and measured signal levels. Make as many
copies of the Log as necessary to document MNET A and B.
An MBX connected to the MODULNET must be in the powered-down state to eliminate signals on the
network during test measurements.
NOTE
As tests are performed, record all conditions and performance data for
future use when servicing the MODULNET.
These specifications apply to the test procedures in this section.
•
Test signal and data rate = 10 MHz at 5 Mb/s (megabits/second)
•
Signal sweep bandwidth = 1 to 30 MHz.
•
Return loss measurement units = dB (decibels)
•
Noise and signal level measurement units = dBmV (0 dB = 1 mV)
2.3.5.1 Trunk Return Loss Measurement
Repeat the following procedure for trunk A and trunk B. Refer to the carrierband tester's operating
instructions as necessary.
1. In preparation for testing the MODULNET:
Check all taps to be sure that every port has either a cable or a 75 ohm termination installed.
Check that every drop cable is either connected to an MBX termination board (MBX must be
installed) or to a 75 ohm terminator.
2. Fabricate an extension cable. Cut a 2.6 meter length of cable from the reel of cable used for the trunk
and install two F connectors.
3. At one end of MNET A, remove the 75 ohm termination from the tap's trunk port. Connect the
extension cable between the carrierband tester's Transmit-Port and the trunk port.
4. Measure the return loss. Specification: -22 dB or greater at 5 Mb/s.
Disconnect the cable and install the termination.
5. Repeat the test from the other end of the trunk.
February 2003
2-31
Installation
SD39MODULNET-1
If the return loss is within specification, leave the carrierband tester connected and proceed to section
2.3.5.2.
If the specification is not met, either a tap or cable segment is defective. Isolate the defect as follows:
•
Remove the extension cable from the near end-of-trunk tap and terminate the tap's trunk port.
•
Disconnect the trunk cable from one of the trunk ports on a tap located in the middle of the
network.
•
Test both halves of the trunk to determine the defective half. If a trunk half consists of three taps
or less, the return loss should be -24 dB or greater.
•
Repeatedly divide and test the defective trunk until the defective tap or cable segment is located.
•
Repair as necessary.
•
Inspect network to ensure that all cables and terminators have been installed.
2.3.5.2 Trunk Noise Level Measurement
Repeat the following procedure for trunk A and trunk B:
1. Ensure the far end-of-trunk tap's trunk port is terminated.
2. If not already connected, connect the carrierband tester to the near end-of-trunk tap.
Connect the 2.6 meter extension cable to the tester's Receive-Port.
3. Wait for approximately one minute and read the noise level. Specification: +10 dBmV or less.
4. Disconnect the tester and install the terminator.
5. Repeat the test from the other end of the trunk.
If the noise level is within specification, disconnect the tester and terminate the tap trunk port.
Proceed to section 2.3.5.3.
If the noise level does not meet specification, a cable routing or grounding problem probably exists.
2-32
•
Inspect the cable routing for noise sources that may have been overlooked when the original site
drawings where approved. Rerouting may be necessary.
•
Check for a ground problem by disconnecting, one tap at a time, a tap's safety ground wire.
When the wire is floating, the noise level should increase indicating the safety ground is of good
quality. Little or no increase of noise can indicate a poor quality ground. In this case, search for
a better safety ground.
February 2003
SD39MODULNET-1
Installation
2.3.5.3 Drop Cable-to-Tap Return Loss Measurement
Repeat the procedure for each drop cable.
1. At each MBX transition board, either disconnect the 75 ohm terminator from MNET A drop cable or
disconnect the MNET A drop cable from the MBX transition board.
Connect the drop cable to the carrierband tester's Transmit-Port.
2. Measure the return loss. Specification: -14 dB or greater at 5 Mb/s. Record each measurement for
future use as a service reference. Terminate the tested cable before proceeding to the next cable.
If measurements are within specification, proceed to section 2.3.5.4.
If a return loss measurement is not acceptable, disconnect the drop cable from the tap and terminate
the cable using a coupler/splice. Test the cable for a minimum return loss of -26 dB. If the return
loss is acceptable, the drop cable is good and the tap is defective.
3. Reconnect or terminate the drop cable.
2.3.5.4 Drop Cable Noise Level Measurement
This measurement should be made on each drop cable that is routed through a noisy area.
1. At the MBX transition board, either disconnect the 75 ohm terminator from MNET A drop cable or
disconnect the MNET A drop cable from the MBX transition board.
Connect the drop cable to the carrierband tester's Transmit-Port.
2. Connect a jumper wire from the cable's F connector on the carrierband tester to the F connector's
threaded barrel on the MBX Transition Board to preserve the cable shield ground.
3. Wait for approximately one minute and read the noise level. Specification: -10 dBmV minimum.
If the noise level is acceptable, reconnect or terminate the drop cable and proceed to section 2.3.5.5.
If the noise level is not acceptable, a new drop cable route may be required.
2.3.5.5 Signal Level Measurement
A signal level measurement is the final confirmation that the connected MODULNET hardware will
perform as expected.
Figure 2–6 shows a sample MNET with typical signal levels. The test procedure will use an auxiliary
signal generator, a standard accessory for a carrierband tester, to simulate an MBX.
Reference Measurement:
1. Using the signal attenuation numbers given in section 1.2 Specifications for cables and taps, calculate
the expected signal level (-dB) at the MBX transition board end of each drop cable.
February 2003
2-33
Installation
SD39MODULNET-1
Assume that the signal reference is the MBX transition board end of the drop cable that is connected
to the tap drop port closest to one end of the network. For example, in Figure 2–6, the signal
reference (i.e., signal generator) would substitute for MBX 1.
2. With the tester, measure the generator's non-adjustable output signal level (10 MHz at 5 Mb/sec =
+66 +/-2 dBmV). Use this measured signal level when performing the MODULNET signal analysis.
2-34
February 2003
SD39MODULNET-1
Installation
Figure 2–6 Network Signal Level Analysis Example
February 2003
2-35
Installation
SD39MODULNET-1
Network Measurement:
Repeat the following test procedure for trunk A and trunk B.
1. At the signal reference point (MBX transition board) selected above, either disconnect the 75 ohm
terminator from MNET A drop cable or disconnect the MNET A drop cable from the MBX transition
board.
2. Connect the drop cable to the auxiliary signal generator. Select a 10 MHz/5 Mb/s signal.
3. Connect a ground jumper wire from the drop cable's F connector on the generator to the F connector's
threaded barrel on the MBX Transition Board to preserve cable shield ground.
4. At the next down-the-line MBX Transition Board, either disconnect the 75 ohm terminator from
MNET A drop cable or disconnect the MNET A drop cable from the MBX transition board.
5. Connect the drop cable to the carrierband tester's Receive-Port.
6. Connect a ground jumper wire from the drop cable's F connector on the tester to the F connector's
threaded barrel on the MBX Transition Board to preserve the cable shield ground.
7. Measure the received signal level and compare it with the calculated signal.
If the measured signal level is acceptable, reconnect the drop cable or install the terminator.
If a unacceptable measurement is encountered, determine the cause before proceeding.
To locate a fault:
•
Backtrack through the network toward the signal source (signal generator) by moving the
carrierband tester and making signal level measurements.
•
Compare the calculated (expected) signal levels for each tap's trunk and drop ports to the
measured signal levels.
8. Continue the test at the remaining MBX locations along trunk A. Repeat steps 4 through 7 until all
MNET A MBX locations are tested.
9. When the trunk A test is completed, remove all test equipment. Repeat the test on trunk B.
After verification of MODULNET A and B, remove all test equipment and terminators from all drop
cables. Proceed to section 2.3.5.6.
2.3.5.6 Cable Sealing and Boots
Perform the following steps at each end of each drop cable.
1. Disconnect the drop cable from the tap or MBX transition board.
2-36
February 2003
SD39MODULNET-1
Installation
2. Seal the trunk and drop cable connectors with gel tape if the environment is hostile. Otherwise, use
heat shrinkable boots or sleeves to seal the drop cable connectors.
Heat shrinkable boots are packaged in connector kits.
White boots ..... MNET A
Black boots ..... MNET B
3. At each tap and MBX transition board, thread the drop cable connector onto its assigned MNET A or
B connector.
Stress relieve the cable and firmly tighten the connector with a 1/2" open end wrench.
If an MBX transition board is not installed, thread a Dropsaver into the unconnected end of the drop
cable to protect the connector. Connect the cable after its associated MBX transition board is
installed.
"
February 2003
2-37
Installation
SD39MODULNET-1
!Notes
2-38
February 2003
SD39MODULNET-1
3.0
Circuit Description
Circuit Description
The MODULNET is a local area network (see Figure 1–1). It has two independent, redundant cable
systems (MNET A and B).
The IEEE 802.4 Token Bus standard is the MODULNET protocol. As such, it uses a deterministic access
method to control which node (i.e., APACS+ MODULBUS Expander Module or other controller or
computer) has the right to transmit. Every node is assured the right to transmit within a specified period
of time.
MODULNET uses a single-channel carrierband technology. The type of carrierband signaling used is
based on a phase-coherent modulation technique that is a form of frequency-shift keying (FSK). The
signal consists of a two frequency data stream with a one-zero pattern. The lower frequency is 5 MHz
and is equal to 1 cycle per bit time (logic 1); the higher frequency is 10 MHz and is equal to 2 cycles per
bit time (logic 0). System data rate is 5-Mbit/s. Signals originate in and are received by MODULBUS
Expander Modules (MBXs).
A MODULNET carries MODULBUS communications between autonomous clusters of controllers and
I/O modules known as Local Area Systems (LASs) that are distributed throughout the factory.
MODULNET traffic is primarily short messages pertaining to status and control that must occur on a realtime basis.
"
February 2003
3-1
Circuit Description
SD39MODULNET-1
!Notes
3-2
February 2003
SD39MODULNET-1
4.0
Maintenance
Maintenance
The MODULNET trunk and drop cables and taps require minimal maintenance. Some routine
maintenance is recommended in the form of a visual inspection.
4.1
Tool and Equipment Requirements
The following tools and equipment are necessary for servicing:
•
Common electronic servicing hand tools
•
Carrierband Network Tester (see section 2.3.1).
4.2
Visual Inspection
The MODULNET should be subjected to a periodic visual inspection. The frequency of inspection is
dependent upon the severity of the environment.
Inspect the MODULNET in accordance with the following check list. Refer to section 4.4 if inspection
reveals a damaged tap or cable segment.
MNET A/B Taps
1. Check each tap's mounting for secure mounting and proper grounding.
2. Check each tap for cracks or other signs of damage. Replace tap if necessary.
3. Check the tap ground wire connection for tightness. Ensure the opposite end of the ground wire
connection is tight.
4. Ensure all unused tap ports are terminated and all terminations are tight.
5. Check all cable connectors for proper tightness. Check connector tightness with a 25 lb-in torque
wrench.
6. Ensure that the environmental protection of all cable connectors (connector boots or gel tape) are
intact and are effective. Replace any defective protective component.
MNET A/B Trunk Cable
1. Check each cable segment for any signs of visible damage such as abrasion, cracks, or tears in the
cable jacket. Check for an "out-of-round" cable section. An "out-of-round" section is an indication
the cable was crushed. Replace a cable segment with any such defects.
2. At points where a trunk cable enters a building, check the cable jacket for cracks or signs of
deterioration. Replace a cable segment with any such defects.
February 2003
4-1
Maintenance
SD39MODULNET-1
3. Trunk cables routed above the ground, especially in out-of-doors cable runs, should be checked for
cable jacket defects (cracks and tears) and installation security. Replace a cable with jacket defects.
If a messenger wire is used, check its condition.
MNET A/B Drop Cable
1. Check each drop cable between its tap and MBX transition board for any signs of visible damage
such as cracks or tears in the cable jacket or an "out-of-round" section of the cable. An "out-ofround" section is an indication the cable was crushed. Replace a drop cable with any such defects.
2. Check each drop cable connector for proper tightness. Check connector tightness with a 25 lb-in
torque wrench.
4.3
MODULNET Troubleshooting
Review the following troubleshooting suggestions if a MODULNET appears to be malfunctioning.
The first step in troubleshooting MBUS/MNET communications is to specify the symptoms that indicate
a communications problem. Identify these symptoms using the checklist provided below. Each symptom
is identified with an alphabetic letter so that it may be associated with the specific faults discussed. Space
is provided to list specific details for the symptoms seen (station numbers; error codes; frequency of
occurrence; etc.
Symptoms:
Details:
A. Poor, or slow communication performance
B. Some station(s) unreachable
C. Intermittent connection to station(s)
D. Communication errors
E. Other
The specific faults discussed below are grouped (High, Medium, and Low) according to the likelihood of
finding them in any given system, based on troubleshooting experience.
HIGH
1. (A, B) Cable lengths exceed
maximum allowed
Check cable length. (Use calculation technique in: Installation
and Service Instruction, SD39MODULNET-1)
Measured Length:
Calculated Length:
2. (C, D) Loose MNET drop cable
crimps
Check connector assembly on cable is secure. Cables labeled
with date codes between 9847 and 0009 (without a second
label, reading “OK-date” indicating that they have been
checked), have a higher probability of problems. Re-crimp or
replace all cables with date codes and/or those that appear
loose. (See: Service Memo SM39MNET-1, Kit Instructions
4-2
February 2003
SD39MODULNET-1
Maintenance
15900-553 and –554. Use connector installation tool kits: RG6, P/N 16056-652; RG-11, P/N 16056-653).
3. (C, D) Tight bends in MBUS and
MNET cables.
Replace cables that are bent too tightly – minimum bend radii:
3 inches for MBUS and RG-6 drop cable, 7 inches for RG-11
trunk cable. For tight MNET installations, use a right-angle
adapter, P/N 16056-663 (see Instructions 15900-553 and -554).
Tight bend radii can cause permanent damage to the MNET
cable dielectric.
4. (C, D) Un-terminated trunk or
drop port
Make sure that there are 75-ohm terminators (Siemens P/N
14753-2, Gilbert P/N 43933 (remove gasket), or Gilbert P/N
26560) on all MNET tap ports that do not connect to a cable.
An unused trunk port indicates one end of MNET and must be
terminated. Failing to terminate the trunk will cause serious
degradation of the MNET signal. Unused drop ports should
also be terminated although the effect of an un-terminated port
is not as severe.
5. (C, D) Loose coaxial connectors
Use a proper torque wrench to tighten all coaxial connectors
(cables and terminators). Use P/N 16056-660, 25 in.-lb. torque
wrench for cables, included in Tool Kits 16056-652 and 16056653. If a proper torque wrench is not immediately available,
approximate 25 in.-lb. by finger tightening, plus 1/8 turn for
connectors and terminator without gaskets. Be sure to relieve
any strain the cable may exert on the connector while
tightening. Insufficient torque can result in a poor connection;
excessive force can result in damage to hardware.
6. (C, D) Insecure MNET tap
connection to mounting
plate/cabinet.
Verify that all MNET taps are firmly secured to a mounting
plate which is firmly attached to the cabinet thus providing a
good ground. The taps use a mounting stud for connection to
the mounting plate and an index hole to prevent rotation. (See
Kit Instruction 15900-256). The mounting stud is the ground
connection for the tap. Failure to ground the tap also leaves the
coaxial cable ungrounded. A tap that is loose and can rotate
does not have a good ground connection!
7. (C, D) Both ends of a cable
segment connected to T1 ports
Make sure that all MNET taps are cabled from T1 on the first
tap to T2 on the next tap (not T1 to T1 or T2 to T2). MNET
uses a segmented ground for the coaxial cable. The trunk port
labeled ‘T2’ is grounded. The ‘T1’ port is isolated from
ground. Connecting both ends of a cable segment to T1 ports
fails to ground the cable. Connecting both ends to T2 ports
creates a ground loop.
8. (B, C, D) Mismatched connectors
Make sure that all MBUS and IOBUS cable connectors and
associated backplane connector use the same method of
securing the cable. That is: spring-lock to spring-lock or screwlock to screw-lock. (See Kit Instruction 15900-558).
Mismatched connectors can cause intermittent operation.
February 2003
4-3
Maintenance
SD39MODULNET-1
MEDIUM
9. (B) Distortion/damage of
MBUS extension cables at
connector ends
Replace all MBUS Extension cables showing signs of distortion
or damage at the connector ends.
10. (C, D) Cables with damaged
connectors
Strain-relieve all MNET/MBUS cables. Replace any cables with
signs of connector damage. (See MNET Kit Instructions 15900553 and -554). Excess force on the cables may result in cable or
connector failure.
11. (C, D) Low grade computer
cable
Replace all MNET cables that are not made from high grade
computer data cable. Suitable cable will be stamped “802.4” (for
IEEE Specification 802.4) and use data-grade connectors. (See:
Installation and Service Instruction, SD39MODULNET-1 for
information on appropriate cable and connector parts.) One
indication of a data grade connector is a smoothly tapered gold
pin crimped to the copper center conductor. A bare, cut copper
wire used as a center pin can damage other components and must
not be used. Cables and connectors designed for cable TV or
other analog applications should never be used for MNET!
12. (C, D) Improperly grounded
APACS+ system
Verify that the entire APACS+ system is properly grounded (See
Installation and Service Instruction, SD39GND-1). Improper
grounding can cause ground loops, which can cause noise.
13. (B, C, D) Modules not tightly
attached to the MODULRAC
Make sure that all modules are screwed down tight to the
MODULRAC and sit evenly in the rack. Check that it is flat
across the bezel of all modules. Misalignment of the bezels
indicates some form of assembly problem and can result in
intermittent backplane connections.
14. (B, C, D) Damaged MNI card
Replace all older MNI cards with the new mounting design.
(Service Memo SM39MNI-1; Kit Instruction 15900-544). On
older units, the MNI card could be damaged if excess stress is
applied to the connector by over-tightening or by cables not
properly strain-relieved.
15. (B, C, D) Bent pins in upper /
lower backplane connectors.
Verify that no modules (controller and IO modules) have bent
pins in the upper and lower backplane connectors. A bent pin in
the upper connector, P1 (even for IO Modules), can cause MBUS
faults. Bent pins in the lower connector, P2, can result in MBUS
faults by causing misalignment of the module.
4-4
February 2003
SD39MODULNET-1
Maintenance
LOW
16. (C, D) Poorly lubricated MBUS /
MNET connections
Lubricate all MBUS/MNET connections or confirm recent
lubrication of all connectors(Kit Instruction 15900-394, included
with the lubricant kit, P/N 14850-121). Lubrication protects the
contacts from harsh environments and fretting corrosion.
17. (C, D) Unreliable connection of
MNET tap to the terminator
caused by rubber gasket
Remove the rubber gasket from all MNET terminators (See
Service Note SN39MNET-1).
18. (C, D) Dangling terminator
contacting a grounded object
When adding a trunk cable to a previously terminated T1 port on
a tap, completely remove the MNET terminator and chain from
the T1 side of the taps before installing the cable. (See
Installation and Service Instruction, SD39MODULNET-1). If the
dangling terminator touches any grounded object, it can cause a
ground loop by grounding the isolated tap trunk port, T1.
19. (C, D) A bowed MODULRAC
backplane
Check for bowed backplates on ten-slot MODULRACs using
Inspection Tool P/N 16114-171-T1. (See Service Memo
SM39MODULRAC-4). A bowed MODULRAC backplane can
cause intermittent connections with modules in the center of the
MODULRAC.
20. (A, B, D) Improperly crimped
coaxial cables
Replace all “noisy” MBX modules (See Service Memo
SM39MODULNET-3). Some coaxial cables within older MBXs
are not crimped properly resulting in an intermittent connection.
21. (C, D) Loose mounting screws
on MBX transition boards
Make sure that both mounting screws for MBX transition boards
are snug (See Installation and Service Instruction, SD39MBX-1).
Each screw acts as a ground for one side of the MNET.
22. (C, D) Insufficient
reinforcement for the cable
connector
Replace all older MBX Transition boards with the new design.
(See Service Memo SM39MBX-3). The new design provides
additional reinforcement for the cable connector.
23. After making any physical change to the communications network, re-check the system to assure that
these guidelines are met.
4.3.1
Advance Diagnostics Techniques Beyond this checklist
In nearly all cases, the detailed inspection techniques reviewed in this checklist can quickly identify the
source of performance problems with MBUS/MNET communication. Many times, additional
deficiencies are uncovered during the inspection that are not yet causing problems but can reduce system
reliability in the future. For these reasons, we strongly encourage all APACS+ system users to follow
these checklists both when attempting to resolve performance problems and as a preventative step to
assure trouble-free operation.
February 2003
4-5
Maintenance
SD39MODULNET-1
For a variety of reasons, users may wish to have Siemens field support engineers participate in the
investigation of performance issues as well as preventive maintenance activities. The field support
engineers follow a procedure that includes all of the inspection steps listed in this checklist. In addition,
all field support engineers are trained in the low level operation of the MBUS/MNET communication
system. At times they may use advanced diagnostic tools to view information on the low level operation.
These tools include:
•
A protocol level event logger developed exclusively for MBUS/MNET (“Mbus Analyzer”);
•
An MNET signal analyzer for operating systems (Carrier Band Monitor);
•
An MNET cable tester designed for IEEE 802.4 communication systems (Carrier Band Tester) and;
•
General purpose cable testing instruments (Time Domain Reflectometer);
In the hands of trained and experience field support engineers, these tools can often pinpoint faults
quicker and with more assurance than less sophisticated techniques. However, due to the level of training
and knowledge required, Siemens supports the use to these advanced tools only by members of the
Siemens technical support groups. Use of advanced diagnostic tools will be at the discretion of Siemens
technical support agents involved in specific investigations.
Completing the inspections reviewed in this checklist is an essential part of every investigation and
should be completed before any other measures are considered.
4.4
MODULNET Testing
The validation procedure in section 2.3.5 can also be used to locate a damaged cable section, a failed tap,
or a failed termination.
Troubleshooting involves comparing previously calculated and measured signal levels with a new set of
measurements to be recorded. The first recorded signal levels should reflect the initial installation.
Appendix B contains a MODULNET Signal Log. Copy the Log as many times as necessary to document
MNET A and B.
IMPORTANT
A new set of calculated and measured signal levels should be recorded
each time a MODULNET is revised or repaired (e.g., cables rerouted,
MBXs added, cable section replaced).
Perform the procedures under section 4.3 to troubleshoot the MODULNET. See section 2.3.5 for a
carrierband tester. A time domain reflectometer can be substituted for the carrierband tester, however, it
is more complex to operate.
4-6
February 2003
SD39MODULNET-1
4.5
Maintenance
Tap or Cable Segment Replacement
If inspection or troubleshooting reveals a damaged tap or cable segment, refer to section 2.3 Tap and
Cable Installation and the following.
•
When replacing a trunk or drop cable segment, be sure to perform all cable installation assembly.
•
When replacing a tap, refer to the tap installation procedure.
•
Completely test the repaired MODULNET and record the results of all tests. Compare them to
previously recorded (e.g., original installation) values. Save all test records for comparison with
future tests.
4.6
Spare and Replacement Parts
One spare Tap of each type used and one spare 75 Ohm F-Type Termination should be stocked for every
1 to 5 in service. Spare and replacement parts can be ordered from one of the addresses in the Warranty
statement or through a local Moore Products Co. representative. Part numbers are stated in section 1.
4.7
Return of Shipment
Within North America
To return a shipment, call the Siemens Repair Order Group at +1 215 646 7400, ext. 4RMA (4762)
weekdays between 8:00 a.m. and 4:45 p.m. eastern time to obtain a Return Materials Authorization
(RMA) number. Mark the RMA number prominently on the outside of the return shipment.
When calling for an RMA number, provide the reason for the return. If returning equipment for repair,
failure information (e.g. error code, failure symptom, operating environment) will be requested. You will
need to supply a purchase order number for repairs.
A Material Safety Data Sheet (MSDS) must be included with each item being returned that was stored or
used where hazardous materials were present. The equipment must be thoroughly cleaned
(decontaminated) to remove any hazardous material prior to return for inspection or repair. The MSDS
must be placed in the container so that it can be read before handling the equipment
Package the assembly in original shipping materials; otherwise, package it for safe shipment or contact
the Repair Order Group for shipping recommendations. A module must be placed in a static shielding bag
to protect it from electrostatic discharge.
Outside North America
Contact the appropriate Siemens subsidiary. Provide the reason for the return. For repairs, supply a
purchase order number. Request equipment packaging and shipping instructions.
"
February 2003
4-7
Maintenance
SD39MODULNET-1
!Notes
4-8
February 2003
WARRANTY
The Company warrants all equipment manufactured by it and bearing its nameplate, and all repairs made by it, to be
free from defects in material and workmanship under normal use and service. If any part of the equipment herein
described, and sold by the Company, proves to be defective in material or workmanship and if such part is within
twelve months from date of shipment from the Company’s factory, returned to such factory, transportation charges
prepaid, and if the same is found by the Company to be defective in material or workmanship, it will be replaced or
repaired, free of charge, f.o.b. Company’s factory. The Company assumes no liability for the consequence of its use
or misuse by Purchaser, his employees or others. A defect in the meaning of this warranty in any part of said
equipment shall not, when such part is capable of being renewed, repaired or replaced, operate to condemn such
equipment. This warranty is expressly in lieu of all other warranties, guaranties, obligations, or liabilities, expressed
or implied by the Company or its representatives. All statutory or implied warranties other than title are hereby
expressly negated and excluded.
Warranty repair or replacement requires the equipment to be returned to one of the following addresses:
Siemens Energy & Automation, Inc.
1201 Sumneytown Pike, P.O. Box 900
Spring House, PA 19477-0900 U.S.A.
Tel: +1 215 646 7400
Fax: +1 215 283 6340
Siemens Moore Process Automation (Canada) Inc.
P.O. Box 370
2719 Highway 7 West
Brampton
Ontario L6V 2L3
Canada
Tel. (905) 457 9638
Fax (905) 457-4182
Fax (905) 457-6499
Siemens Moore Process Automation
Copse Road
Lufton
Yeovil, Somerset BA22 8RN
England, UK
Tel. (44 1935) 706262
Fax (44 1935) 706969
Moore Process Automation Solutions (Italia)
S.r.l.Via S. Aleramo 2
20063 Cernusco sul Naviglio
Milano, Italy
Tel. (39) 02 9290541
Fax (39) 02 92905454
SIEMENS Nederland NV
Siemens Advanced Engineering Pte Ltd
A & D AS PAS CoC/A&D PI1/PI5 CoC
2 Kallang Sector 5th Floor
Singapore 349277
Tel. +65 740 7700
Fax +65 740 7817
TIC Singapore Tel: (65) 7407842
Prinses Beatrixlaan 26
NL-2595 AL Den Haag
P.O. Box 16068
NL-2500 BB Den Haag
Tel.
+31 (0)70 333 1201
Fax
+31 (0)70 333 3885
The warranty will be null and void if repair is attempted without authorization by a member of the Siemens Energy
& Automation, Inc., Service Department.
"
Siemens
Energy & Automation
INSTALLATION AND SERVICE
INSTRUCTION ADDENDUM
CSA HAZARDOUS LOCATIONS PRECAUTIONS
SDA-CSA-1
Issue: 1
Date: 11/88
INTRODUCTION
This addendum provides CSA hazardous location precautions that should be observed by the user when installing or servicing the
equipment described in the accompanying Instruction. These statements supplement those given in the accompanying
Instruction.
WARNING
Failure to observe the following precautions could result in an explosion hazard.
PRECAUTIONS
For Class I, Division 1 and Class I, Division 2 hazardous locations:
–
Use only factory authorized replacement parts. Substitution of components can impair the suitability of this equipment
for hazardous locations.
For Division 2 hazardous locations:
When the equipment described in the accompanying Instruction is installed without safety barriers, the following precautions
should be observed. Switch off electrical power at its source (in non-hazardous location) before:
–
Connecting or disconnecting power, signal, or other wiring
–
Replacing a fuse, circuit board, or any other component connected to the electrical circuit.
This completes the precautions.
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Energy & Automation
Addendum a la notice d’installation et de depannage.
Précautions relatives aux emplacements
dangereux définis par la CSA
INTRODUCTION
Cet addendum indique les précautions relatives aux emplacements dangereux définis par la CSA que doit prendre l’utilisateur
lors de l’installation ou du dépannage de l’appareil décrit dans la notice ci-jointe. Ces directives completent celles qui sont
données dans la notice ci-jointe.
AVERTISSEMENT
Si les précautions suivantes ne sont pas prises il pourrait résulter un danger d’explosion.
PRÉCAUTIONS
Emplacements dangereux de classe I, division 1 et classe I, division 2:
Les pièces de rechange doivent être autorisées par l’usine. Les substitutions peuvent rendre cet appareil impropre à l’utilisation
dans les emplacements dangereux.
Emplacements dangereux de division 2:
Lorsque l’appareil décrit dans la notice ci-jointe est installé sans barrieres de securité, on doit couper l’alimentation électrique à la
source (hors de l’emplacement dangereux) avant d’effectuer les opérations suivantes:
–
branchement ou débranchement d’un circuit de puissance, de signalisation ou autre.
–
Remplacement d’un fusible, d’une carte de circuit imprimé ou de tout autre élément connecté au circuit électrique.
Ceci termine la section Précautions.