Power Entry Module - SMART Embedded Computing AXP1440-C07 Installation And Use Manual

2.10

Power Entry Module

The Power Entry Module (PEM) is a Field Replaceable Unit (FRU) and can be replaced
while the system is on, but the power for the PEM being replaced (PEM A or PEM B) must
be shut down at the external source. Replacement can take place in under 30 minutes by
a trained service person.
For important information on removing power before replacing a PEM, refer to
Recommended Power Off Procedures on page 89
The PEMs are accessible from the rear of the shelf and connect to the power entry module
connectors on the backplane. A removable plastic housing covers the power feeds and
returns to prevent accidental shorting. The PEM also features an injector/ejector handle
that provides the hot swap mechanism for signaling the state of the PEM prior to removal.
Each PEM powers two separate power domains A and B and each domain supports two
80A power rails to supply power to the AdvancedTCA slots.
The PEMs are hot-swappable and will not cause a fault when one is removed for
replacement. Two PEMs are required to support 2N redundancy. If your system is
configured for redundant operation using two power feeds, they operate in load sharing
where the total load is equal to or less than what one power feed can provide.
AXP1440-C07 Installation and Use (6806800V18A)
AXP1440-C07 Shelf Description
Alarm
Display
Panel
and
Power Entry Module on page 90.
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