Power Entry Module (Pem); Description - Emerson AXP 1410 Installation And Use Manual

Configuring and Operating the System
5.5

Power Entry Module (PEM)

This section discusses the operations of the Power Entry Module.
5.5.1

Description

The AXP 1410 has PICMG 3.0 compliant, dual PEMs and is rated for normal -48VDC to
-60VDC. The PEMs plug directly into the midplane and deliver power to the backplane. Each
input is rated for 80 amps. The two 80 amp feeds each power eight AdvancedTCA slots and the
upper and lower FTMs. Each PEM also generates a separate +12V for redundant powering of
the SAMs. This voltage is distributed to each of these modules across the backplane.
Power conversion for the SAMs and PEMs consists of two 66 watt, +48VDC to +12VDC
converters which distribute dual power busses of +12VDC to separate parts of the system. The
+12VDC outputs are provided on the backplane connector to the rest of the shelf. Power is
redundant via the secondary PEM.
Removing power to these components cannot be accomplished by turning the PEM's circuit
breakers to the OFF position. The PEMs remain powered until the -48VDC power to each
PEM is removed. Make sure you disconnect the power at the external source before
removing the PEM from the shelf.
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AXP 1410 Installation and Use (6806800H70F)