Artesyn AXP1440, Installation And Use Manual, Page: 122 / 156

FRU Installation
120 AXP1440 Installation and Use (6806800H23U )
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Nut driver (torque nut to 5.65 N-m)
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AXP1440 DC Power Installation Kit, PN 6706822A01 (shipped with AXP1440)
6.4.2 Replacing 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.
Procedure - Remove the PEM
To remove a PEM, refer to this figure and follow the steps.
1. Turn off both breakers located on the PEM.
NOTE: To turn off the breakers, you need to use a tool (small screwdriver) which can be
inserted into the opening of the protective covers which are assembled over top of
these breakers. When the breaker is turned to the OFF position, the red part of the
breaker switch will be exposed.
2. Locate the target power input cable’s terminals at the branch circuit or power
distribution unit. Open the external circuit breakers that provide DC feed power to the
PEM you are replacing.
OFF ON OFF ON
-48 VDC RTN
-48 VDC
-48 VDC RTN
-48 VDC
IS HS OOS