LINEGUARD - 8
SHORT TO EARTH
Professional Speaker Line Monitor
LINE
RESET
START
LINE DISCONNECT
1
2
3
4
5
6
7
8
SHORT CIRCUID
MEASURE
Lineguard - 8
General information’s:
To guarantee the correct function of the speaker in a voice alarming
system, the speaker lines must be checked in regular interval. In
complex installation this test may be time extensive.
With the Lineguard Basic, 100V-Speaker-lines and all there
connections and cables will automatically be monitored. This system
is an easy solution at a low price, that still fulfils all the
specifications of the voice alarming norm (EN 60849) concerning the
speaker lines monitoring.
The Lineguard Basic checks upto maximal 8 speaker-lines for the
following failures: short-circuit, open line and earth-error (grounded
speaker-line).
During the calibration the system checks automatically all the ports
for connected speaker-lines and save the line information into a non
volatile memory as a reference. Detected lines failure (open, short)
will not be saved and will still uninstall.
Correct working and installed speaker-lines will be displayed
corresponding green lighted LED on the font of the Lineguard.
as
After the correct installation, the speaker-lines will be checked in
regular adjustable time intervals for open lines, shorts and
grounding errors.
The measuring sequence can also be controlled by an external timer
providing a dry contact on the trigger-port at the rear of the system.
LINEGUARD - 8
A manual measurement can be activated by pressing the START-key
on the system front.
If during a line-check a mismatch or a failure is detected on a
speaker-line the corresponding line LED will start blinking fast and
parallely light up the red error type LED.
If more than one error have occurred at the same time, the line
number will be shown alternatively in the 7-Segment display
together with the corresponding error-type LED, the internal alarm
sound will start and the error-out port (relay dry contact) will be
closed.
The internal alarm sound can be stop by pressing the „RESET“ key
the error-out port (Relay) will stay activated (closed), an so
guarantee the error transmition to upper and higher control system.
In case of an short-circuit the defective line will be disconnected
from the amplifier, assuring by this way the save function of parallel
connected lines.
Installed volume regulator must be set to a constant value during
the line test. For this purpose the Lineguard provide eight dry
contact ports that will be closed while measuring the line.
Emergency call relay with different voltage, integrated in the
volume-regulator can so be controlled through these ports. An
integrated watchdog function will reset the all system in case of a
Processor malfunction. The saved data’s and the system parameters
will not get lost by this function. Every of this reset will be
registrated and increases the Watch-Dog counter. The Lineguard
store the last 99 errors into a special memory witch can be read out
through
the
serial
port
(RS232)
to
a
PC-using
(Windows
HyperTerminal).
The Lineguard (Line monitoring system) can be used as a stand
alone system, and is working independently from AGS (Amplifier
monitoring) or other monitoring systems from other manufacturer.
The IEC 60849 specifies the necessary requirement of a complete
voice announcement-system. A single component like the Lineguard
or the AGS can help to reach this standard. For example (the best
cable, Amplifier or Speakers) alone, will never be able to fulfil the
IEC requirement. Only the whole installation with the correct
components and wiring in accordance to the location security level
will make the system conformity.
_________________________________________________________
LINEGUARD - 8
Description:
Lineguard Basic checks up to 8 Speaker-lines.
Each line will be tested on: Short-circuit, open line, Ground-error.
There are 3 possibilities to start a measurement:
Internal (Timer DIP-Switch setting)
Start-key (Front panel)
External Time-trigger (dry contact)
Each detected mismatch or line failure will be announced by an
alarm sound and displayed on a 7 Segment Display and on Line and
Error-type LED.
If more than one error happens at the same time, the line number
will be shown alternatively in the 7-Segment display together with
the corresponding error-type LED.
Pressing the RESET-key will only Stops the alarming sound but will
not affect the error relay witch will still be activated.
The line check can be delayed or blocked when closing (dry contact)
the Block-port.
If the port is activated a „E“ will be shown in the 7 Segmentdisplay. The line test will still block as long as the port activation.
While measuring a line 3 relay will be activated. The first is
dedicated to the measured line and 2 undedicated. These can be
used for Emergency Volume-regulator.
The Power fail relay will be activated when the whether the system
is turn off or main power fails.
The Lineguard can work with 24 Volt
connected on the rear of the system.
redundancy
power
The option Earth (ground) error check can be desactivated .
The setting will be made on rear of the system DIP-Switch 1
The switch 1 is for line1 and so on.
to
be
LINEGUARD - 8
Switch ON means measurement
(ground) error checking.
of
the
selected
line
with
Earth
Switch OFF means no Earth (ground) error checking on the selected
line.
.
1 2 3 4 5 6 7 8
ON
Programming the interval timer:
The measurement interval can be set as shown below:
DIP-Switch Nr. 5 OFF means: No internal timer function.
Interval set to 60 SEC
1 2 3 4 5 6 7 8
ON
Interval set to 30 MIN
1 2 3 4 5 6 7 8
ON
Interval set to 12 STD
1 2 3 4 5 6 7 8
ON
Interval set to 5 MIN
Interval set to 10 MIN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
ON
Interval set to 1 STD
ON
Interval set to 3 STD
1 2 3 4 5 6 7 8
ON
Interval set to 24 STD
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
LINEGUARD - 8
First start:
Connect all speaker lines.
Set DIP-Switch according needed function.
Turn on Power
The 7 segment display blinks secondly.
Start calibration (Press shortly the key “Start” and “Reset” at
the same time)
All the correctly installed speaker lines will now be installed.
All the installed line-LED will light green.
If an error happens during the calibration, the fault
displayed but the corresponding line will not be installed.
will
be
START
SHORTH TO EARTH
OPEN LINE
SHORT CIRCUIT
1
2
3
4
5
6
7
8
Reading out the last 99 errors:
Connect a Zero-Modem cable from the RS232 to the PC-Serial-port.
Start the communication-Software (Hyperterminal with 9600 Baud
Rate and HARDWARE-protocol).
Activate the transmition by turning On DIP-switch Nr.1.
1 2 3 4 5 6 7 8
Reset the DIP-Switch to OFF.
Clearing all the memory:
All the data´s (including the 99 last errors) will be cleared, when
pressing and Holding the “Reset” key during the system Power ON.
RESET
LINEGUARD - 8
Rear panel
Speaker line 8
Amplifier 8
Speaker line 7
Amplifier 7
Speaker line 6
Amplifier 6
Speaker line 5
Amplifier 5
Speaker line 4
Amplifier 4
Speaker line 3
Amplifier 3
Speaker line 2
Amplifier 2
Speaker line 1
Amplifier 1
Relay
Close while
measuring line 8
Relay
Close while
measuring line 7
Relay
Close while
measuring line 6
Relay
Close while
measuring line 5
Relay
Close while
measuring line 4
Relay
Close while
measuring line 3
Relay
Close while
measuring line 2
Relay
Close while
measuring line 1
DIP-Switch GROUND
RS232 PC
DIP SW ITCH-Funct ion
Start measurment
0V
Block measurement
0V
Dry contact (close while measuring)
Power faill
Error
24V redundancy power
0V
230 V AC
Power switch
LINEGUARD - 8
Technical data´s:
Test range:
25 Ω > Z < 1.600 Ω (256 steps)
400 Watt > P < 6 Watt (at 100Volt)
Error detection:
Short-circuit, open lines, Earth (Ground)
Measuring time:
100 m.sec. each line
Measuring frequency:
16 KHz
Measuring interval:
1/5/10/30/60/180/720/1440 Minutes
Display :
7-Segment, LED
Line in:
8
Line out:
8
Power:
230 Volt; 50..60 Hz
Notstrom: + 24 V DC
Consummation:
20 VA
100V relay:
160 V AC (max.); 1250 VA (max.)
Measurement relay:
48 V DC (max.); 1 A DC (max.)
Temperature range:
- 5° C > T < 50° C
Dimensions (W x H x D)
483 x 45 x 240 mm (19“- Rack 1 HE)
Case:
Black, Metal.