Chapter 17
DAP 216/DAP216N Discrete
Output Module
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V
Overview
V
Resetting the Module After an Overload or Short Circuit
V
Protecting the Module from Inductive Back EMF
V
DAP216N Differences
V
Specifications
DAP 216/DAP216N Discrete Output Module
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17.1 Overview
The DAP 216/DAP216N is a discrete output module with 16 independent
24 Vdc output circuits. It can drive relays, motor starters, pilot lamps,
valves, solenoids and other similar loads. The module is structured in
two group of eight outputs, each output electrically opto-isolated from
the I/O bus, and each group is protected against short circuit and
overload.
Note: The AS- -BDAP- -216 has been enhanced. The enhancements
have resulted in the AS- -BDAP- -216 being superceded by the
AS- -BDAP216N.
24 VDC
24 V Common
2A
2A
Reset Amber
LED
1
2
Out1
Out2
Out3
Out4
Out5
Out6
Out7
Out8
Out9
Out10
Out11
Out12
Out13
Out14
Out15
Out16
3
4
5
6
7
8
9
10
11
Output
Driver
Red LED
I/O Bus
Interface
Fault
Detection
Isolation
D--Flop/8
Opto--Coupler
Green LED
12
13
14
15
16
17
18
19
20
21
22
Figure 79 Wiring Diagram and Simplified Schematic for the DAP 216 Output Module
17.1.1
LEDs
The DAP 216/DAP216N has 20 LEDs. Two green LEDs opposite
terminal screws 1 and 12 indicate when ON that working voltage is
available to the two groups of eight discrete outputs below them. Two
amber LEDs opposite terminal screws 2 and 13 go ON to indicate a short
circuit or overload problem in the output group below them. There are
16 red LEDs opposite terminal screws 3 ... 10 and 14 ... 21, indicating
when ON that the adjacent discrete output is in an ON condition.
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17.2 Resetting the DAP 216 Module After an
Overload or Short Circuit
A short circuit or overload condition will cause an output point to turn
itself off. The degree of overcurrent that causes the device to shut off is
determined by thermal characteristics unique to the individual point
switching device. When overheated due to overload conditions, the
device turns off to protect itself.
The two amber LEDs display short circuit or overload conditions on the
two discrete output groups. After you have taken corrective measures to
remove the cause of the overload or short circuit, push the yellow reset
button on the front of the module to reactivate it.
Reset Button
DAP 216 Only
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Figure 80 Front View of the DAP 216/DAP216N Module
Note: No reset button exists on DAP 216N.
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DAP 216/DAP216N Discrete Output Module
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17.3 DAP216N Differences
Note: The AS- -BDAP- -216 has been enhanced. The enhancements
have resulted in the AS- -BDAP- -216 being superceded by the
AS- -BDAP216N.
Warning! In the event of an enabled output sensing an over
current condition, the output will disable, until the over
current condition is removed. The output will then re- -enable
itself, if still set ON in the logic program.
3.
The manual reset button of the BDAP- -216 has been replaced by a
solid state retry on a shorted output.
4.
The module restarts field devices automatically when the output is
set ON in the User Logic and the detected field over current
condition is removed. Refer to the user logic example in Figure 81
if detection and manual reset is still desired.
5.
You may now apply the full 0.5A per point for 4A per Group and 8A
per Module.
6.
The input impedance of the electronic circuity that handles the
24Vdc power for the outputs was lowered to accommodate long runs
of the power supply cable. As a result, the inrush current draw from
the power supply is increased from about 6A for 2 microseconds to
54A for 12 microseconds. This increase, however, is well below the
inrush current that the module draws from the external power
supply when outputs are switched on.
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40001
STAT
12
0513
1000X
5
40012
SENS
01
0513
0514
0514
Figure 81 User Logic Example to Detect Module Overload Condition
Each Compact I/O Module returns a Health Bit to the controller when in
use. This bit is a single bit in a register that shows the slot position of
the module and its status. When the module is functioning correctly this
bit is set to ”1”. User logic can be attached to the state of this bit to hold
the logic associated with this module in an OFF condition until an
operator pushes a switch to reactivate the user logic.
In Figure 81, a STAT function is used to read 12 registers of which
register 12 is the status word for the modules in the primary rack 1. The
BDAP216N has been placed in slot number 5, so a SENS function block
is used to sense bit 5 of this register. The output is tied to coil 0513
which turns OFF when the module becomes unhealthy. To trap this
condition even if coil 0513 turns ON again, it is latched into coil 0514.
This coil can then be used by the programmer as an enable/disable to
ladder logic associated with the BDAP216N in this particular slot and
particular process. The user logic is restarted by the operator pressing a
button attached to input 1000X.
Note: The BDAP216N will automatically restart and reset the Health
Bit when the overload condition is removed. This network only holds
the reset condition of any user logic programmed OFF under the
control of coil 0514 in the above example.
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17.4 Protecting the Module from Inductive Back
EMF
If you have inductive loads on longer lines with logic elements located in
the output loads, install an external clamping diode in parallel with the
operating coil to protect the module from reverse EMF.
Clamping Diode
Inductive
dc Load
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Figure 82 Clamping Diode on an Inductive Load
17.4.1
Suggested Component Values
The clamping diode forward current rating must be equal to or greater
than load current. Diode PIV rating must be 70 ... 100 V.
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17.5 Specifications
DAP216 /DAP216N Specifications
Module Topology
Power Supplies
Electrical Characteristics
Number of Outputs
16
Number of Groups
2
Points/Group
8
Isolation
Each point opto--isolated
from the I/O bus Each output group isolated from the
other
External Source Requirement
24 Vdc
Internally Provided Source
5 V, < 50 mA from the I/O
bus
Internal Power Dissipation
1 W (typical)
Operating Mode
True High
ON State Signal Level
External supply --3V
OFF State Signal Level
0 ... +2 V, < 1mA
Load Current/Output
0.5 A max.
Max Load Current/Group
2 A (DAP 216),
4 A (DAP 216N)
Response Time
< 1 ms
Reverse--EMF Protection
Clamping diode recommended across inductive
loads.
Switch Capacity for Bulbs
OFF--ON Operations at
Maximum Power
5 W (surge current = normal
current x 10) 1000/h (inductive load @ maximum load
current) 100/s (resistive
load) 8/s (maximum lamp
load)
Wire Size/Terminal
One wire: 14 AWG
Two wires: 20 AWG
I/O Map
Discrete 1x/0x
0 in/16 out
Dimensions
WxHxD
40.3 x 145 x 117.5 mm (1.6
x 5.6 x 4.5 in)
Weight
220 g (.5 lb)
Agency Approval
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VDE 0160; UL 508; and cUL Standards
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