Rockwell Automation 1771-OP Protected AC (120V) Output Module Installation Instructions - Manual (Page 8)

Protected AC Output Module 8
Publication 1771-IN077A-EN-P - October 2002
You can use an output of the 1771–OP module to drive an input of a
120V AC input module (1771–IA, –IA2, –ID and –IAD) to indicate
status, such as the turning on a motor starter (Figure 2). Both
modules must be powered by the same ac source. In addition, you
must add an external resistor between the output terminal and the
common (L2) (Figure 2). Typically, this is a 2.5K ohm, 10W resistor.
Figure 2
Using an Output Module to drive an Input Module
L1
2.5K ohm
10 Watt
Resistor
A
O
1
2
3
4
5
6
7
B
L1 A
O
1
2
3
4
5
6
7
B
L2
L2
Typically
ac Low
ac High
Protected AC (120V) Output Module
1771-IA
AC (120V) Input Module
1771-OP
L1
2.5K ohm
10 Watt
Resistor
A
O
1
2
3
4
5
6
7
B
L1
L2
Typically
ac High
Protected AC (120V) Output Module
1771-OP
AC/DC (120V) Input Module
1771-IAD
L2
ac Low
11885-I