Rockwell Automation 1771-OND INSTL.INSTR AC (24V) OUTPT.MOD - Manual (Page 9)

AC (24V) Output Module 9
Publication 1771Ć5.41 - May 1996
If a problem occurs, follow the procedure listed below.
Modules with Internal Fuses Only
1. Turn off all power to the I/O chassis and all output device power
to the field wiring arm.
!
ATTENTION: Remove power from the 1771 I/O
chassis backplane and wiring arm before removing or
installing the module.
•
Failure to remove power from the backplane or field
wiring arm could cause module damage, degradation
of performance, or injury.
•
Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
2. Pivot the wiring arm away from the module and remove the
module from the chassis.
3. Replace the blown fuse with a 10A, 250V rectifier fuse (1/4 x
1-1/4 inch), Littelfuse part number 322010.
4. Replace the module in the chassis and attach the field wiring arm.
5. Turn OFF all outputs to the module.
6. Turn ON power to the I/O chassis only.
7. Check that the red status indicators on the front of the module
( Figure 4 ) are off (no outputs on). Make sure the red fuse blown
indicator is off.
8. Turn on output device power to the field wiring arm.
9. Start with bit 00 and turn on individual outputs one at a time.
Turn off the previous output before turning on the next output.
10.If the red fuse blown indicator turns on, note which output is
faulty and trace the output wiring to the faulty device.
After correcting the fault problem, return to step 1 and begin again.
If you cannot locate a faulty output, return to step 9 and turn on 2 or
more outputs at the same time. Total output current should not
exceed 2A per output, or 8A total per module.
Troubleshooting