Table of Contents
Troubleshoot the Power Supply
The ControlLogix power supply has a green LED indicator that remains on during
normal operation. If the indicator is off during normal operation, try the following:
1. Verify that line voltage is within the specified range.
2. Make sure the input voltage jumper is in the proper position (see page 5).
3. If indicator remains off, cycle line power off.
4. Loosen the screws holding the power supply to the chassis.
5. Slide the power supply out so the rear connector is disconnected.
6. Wait 45 seconds and re-apply power.
7. If the indicator turns on, verify that the system module loads are within the
output rating of the power supply and re-install the power supply in the
chassis.
8. If the LED turns off, return the power supply to your local Rockwell
Automation distributor.
Installing the ControlNet Communications Module
Install the 1756-CNB module for ControlNet communications into slot 0 of the
chassis.
1. Align the module circuit board with the top and bottom guides in the
chassis.
2. Slide the module into the chassis. Make sure the module properly connects
to the chassis backplane.
TIP
The module is fully installed when it is flush with the power
supply or other installed modules.
To remove the module, push down on the locking clips at the
top and bottom of each module. Slide the module out of the
chassis.
ProcessLogix Hardware
Publication 1757-5.1 - August 1999
9
Table of Contents
