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

RealPresence®Collaboration Server 4000 Hardware Guide
To replace an AC power entry module (PEM):
1 Unplug the Power cord connected to the failed PEM unit.
2 Unscrew the captive screws on the rear panel of the PEM unit that secures the unit to the chassis.
3 Using the handle fitted to the PEM, pull the PEM unit out.
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.

Replacing a DC Power Rail Module (PRM)

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 PRM 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.
To replace an AC power entry module (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 feeds.
3 Remove the plastic cap fitted to the Terminal block that protects the direct current connections.
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