Rockwell Automation 1771-IAD AC/DC (120V)Input Installation Instructions - Manual (Page 9)

AC/DC (120V) Input Module 9
Publication 1771ĆIN023B-EN-P - August 2002
The front panel of your module contains one green module active
indicator, and 16 red status indicators as shown below.
ACTIVE
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
Module Active
Indicator (green)
00 to 17
Status Indicators
(red)
10592ĆI
When the green module active indicator lights, the rack power
supply has properly established 5Vdc. ,The module active indicator
must be lit to properly interpret the red status indicators.
The red status indicators are provided for system logic side
indication of individual inputs. When a red indicator lights, voltage
is present on the terminal. The module transfers this information to
the backplane for the processor to read. See ‘‘Troubleshooting” for a
description, probable cause, and recommended action to take for
common faults based on indicator responses.
Use this table to help you interpret the 1771-IAD status indicators
and to troubleshoot module and system faults.
Indicator Status (color) Description of Fault or System Status Action to Take
Module active ON (green) Normal Indication None
Module active ON (green) and
Input status ON (red)
Check for voltage on terminal. If voltage is present, take no action. If no
voltage is present, replace the module.
Module active ON (green) and
Input status OFF
Input devices not functioning properly or
faulty input circuitry on module.
1. Check input devices.
2. If input devices are OK, replace module.
No voltage on terminal. None
Module active OFF and
Input status ON (red) or OFF
Not valid unless module active indicator
is on; when active is off, indicators do not
represent processor status.
1. Check chassis power supply and module
input power.
2. If power supplies are OK, replace module.
Interpreting the Status
Indicators
Troubleshooting