Installing Power Entry Modules; Tools You Will Need; Removing The Pem - Emerson AXP1620 Installation And Use Manual

Installing Power Entry Modules

6.4
6.4.1
6.4.2
AXP1620 Installation and Use (6806800E23E)
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Installing Power Entry Modules
The AXP1620 shelf supports two Power Entry Modules (PEMs). Since the shelf is equipped
with a redundant power distribution system, the removal of a single PEM does not interrupt
system operation. PEMs are accessible from the rear of the shelf. Each PEM has EMI gaskets
on all sides of the module that provide EMI shielding.
The following instructions describe how to replace a power entry module. For further
information on power entry modules, refer to

Tools You Will Need

Multimeter
Standard #2 Phillips-head screwdriver
7/16" Torque wrench
Nut driver (torque nut to 50 in. lbs.)
AXP1620 DC Power Installation Kit, PN 6706822A01 (shipped with AXP1620)

Removing the PEM

When replacing a PEM, make sure you have a replacement PEM available. Replacement can
take place in under 30 minutes by a qualified service person. PEMs are accessible from the rear
of the shelf.
Replacing one PEM is done while the other PEM is in operation. Having the PEM located in the
shelf is critical to maintaining proper airflow and cooling of the shelf. Steps in which a PEM is
removed from a slot and reinserted should be completed within 3 minutes to maintain the shelf
within safe operating temperatures.
Read all cautions and warnings, and ensure the equipment is properly grounded by
reviewing the procedure in
The PEM has multiple power sources. This procedure should be followed precisely to
ensure the PEM is isolated from all power sources before removing the PEM from the
shelf, or removing the plastic terminal block lug cover.
This procedure assumes that the redundant PEMs are powered on in the shelf.
Power Entry Modules (PEMs) on page
Grounding the Shelf on page
FRU Installation
55.
85, and follow these steps.
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