User guide

Hardware Installation
130
890 USE 108 00 August 2001
Daisy Chaining
Groups of
Similar I/O
Modules
You can daisy chain groups of similar modules within a drop that requires voltages
from external power sources. Each group, however, should have dedicated wires
to the external power supplies. Typical groups include 24 Vdc input/output modules,
120 Vac input/output modules, 230 Vac modules, or analog modules.
The following figure is an example of how a group of relay modules can be daisy
chained.
Note: The common connections should not be daisy chained.
Note: The shaded areas denote the internal jumpers on the module’s printed circuit
boards.
+24 VDC
DAP 204 DAP 212 DAP 208
Relay Coils Power Supply
24 V Common
1
10
9
2
8
7
3
6
4
5
11
12
13
14
15
16
1
10
22
9
2
8
3
7
4
6
5
11
21
12
13
14
1
10
11
12
13
14
15
16
9
2
8
3
7
4
6
5
17
18
19
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21
22
15
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22