Replacing A Dc Power Rail Module (Prm) - Polycom RMX RMX 4000 Hardware Manual

Polycom RMX 4000 Hardware Guide

Replacing a DC Power Rail Module (PRM)

4
Carefully slide the PEM unit out from the rear slot.
5 Slide in the replacement PEM unit.
6 Push the PEM unit firmly into the Power Supply, making sure it is
properly seated in its slot.
7
Tighten the captive screws on the rear panel of the PEM unit to the
rear chassis.
On the rear of the RMX 4000 two DC Power Rail Modules are fitted, each
with their own power cord.
Use the following procedure to replace a DC Power Rail Module:
•
Please verify the type of PEM used on your RMX 4000. Do not insert a
Power Rail Module of a different type on your system.
• When replacing a DC Power Rail Module: 
On the Mains, disconnect the electricity that supplies direct current running
through the power cable to the failed DC PRM.
1
Turn OFF the circuit switch on the each of the DC PRMs and from the
Mains.
2
Verify that DC PRM unit you are about to replace on the RMX 4000 is
not HOT or has any Live current feed.
3 Remove the plastic cap fitted to the Terminal block that protects the
direct current connections.
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