Reinstalling the M320 Power Supplies
Reinstall the lowest power supply first and finish with the upper power supply. To reinstall AC or DC power supplies (see Figure 1):
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
- Loosen the captive screws on the installation handle completely, and remove the handle from the chassis.
- Switch the circuit breaker on the DC power supply faceplate to the off position (O).
- Using both hands, slide the power supply into the chassis until you feel resistance.
- Firmly push the power supply into the chassis until it comes to a stop. The power supply faceplate should be flush with any adjacent power supply faceplates.
- Tighten the captive screws on each side of the power supply faceplate to secure the power supply in the chassis.
- Repeat the procedure for each of the remaining power supplies.
Figure 1: Reinstalling a Power Supply

