Rockwell Automation 1771-IN ac (24V) Input Module Installation Instructions - Manual (Page 7)

Publication 1771-IN082A-EN-P - February 2005
AC (24V) Input Module 7
4. Connect terminal B to the L2 (low) ac return. Terminal A is not used.
Use stranded 14 or 16 AWG (2.0-1.5mm
2
) to minimize the voltage drop
over long cable distances
.
Interpret the Status
Indicators The front panel of your module contains 8 red status indicators (below). The
red status indicators are on when the associated output is on.
ATTENTION
You can use an ac (24V) output module (cat. no. 1771-ON)
to directly drive terminals on an ac (24V) input module
(cat. no. 1771-IN), but you must connect a 250
Ω, 5W
resistor between the output terminal and L2 (common) as
shown in the following figure. Use the same ac power
source to power both modules to ensure proper
phasing and prevent module damage.
L1
250 ohm
5 Watt
Resistor
A
O
1
2
3
4
5
6
7
8
L1 A
O
1
2
3
4
5
6
7
8
L2
L2
Typically
AC Low
AC High
AC (24V)
Output Module
(Cat. No. 1771-ON)
AC (24V)
Input Module
(Cat. No. 1771-IN)
11903-I
Not used
Output 0
Output 1
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
Status Indicators
1 1067-I