Rockwell Automation 1771-IAD AC/DC (120V)Input Installation Instructions User Manual
Page 8
AC/DC (120V) Input Module
8
Publication 1771ĆIN023B-EN-P - August 2002
You can also use a 1771-OA output module to drive an AC/DC
(120V) input module (cat. no. 1771-IAD) but you must connect one
of the following between the output terminal and L2 (common).
•
2500 ohm, 10W resistor
•
RG-1676-1 Electrocube (San Gabriel, California)
Use the same ac power source to power both modules to ensure
proper phasing and prevent module damage. All inputs to the
1771–IAD module must be powered by the same phase of the ac
source.
An Output Module Driving an Input Module
AC (12Ć120V) Output Module
(Cat. No. 1771ĆOAD)
AC/DC (120V) Input Module
(Cat. No. 1771ĆIAD)
Note: 1771ĆOAD output voltage range is
12Ć138V ac. However, the onĆstate voltage
range of the 1771ĆIAD is 79Ć138V ac.
L1
120V ac High
ac Low
10590ĆI
L2
AC (120V) Output Module
(Cat. No. 1771ĆOA)
AC/DC (120V) Input Module
(Cat. No. 1771ĆIAD)
Note: 1771ĆOA output voltage range is 92Ć138V ac.
However, the onĆstate voltage range of the 1771ĆIAD
is 79Ć138V ac.
L2
ac Low
2500 ohm 10W
resistor
L1
ac High