DC (12-24V) Input Module
Cat. No. 1771-IB
Installation Data
4
Figure 1
Connection Diagram (2-Wire Devices)
Input 0
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
DC Common
Not used
DC
Power Supply
+
-
(See Applicable Codes and Laws)
A
0
1
2
3
4
5
6
7
B
(Actual wiring runs in this direction.)
11833-I
Connect one terminal of your 2 or 3–wire input device to terminals 0
through 7 (Figure 1). Connect 3–wire input devices, such as Allen–Bradley
proximity switches (Bulletin 871) to operate in a current source mode
(
).
Connect terminal B to the dc common. Terminal A is not used. Connect the
+dc line to the other terminal of your input devices. Use stranded 14 or 16
gauge wire to minimize the voltage drop over long cable distances.
Important: You can directly drive terminals on an DC (12–24V) Input
Module (cat. no. 1771–IB) from terminals on the following modules:
DC (10–60V) Output module (cat. no. 1771–OBD)
DC (12–24V) Output module (cat. no. 1771–OB)
Important: Use the same dc power source to power both modules to
ensure that ground is at the same potential.