G10 Installation Guide 7.13.2
110
C
Rev. 005-140228
Removing and Replacing a PEM
This section provides the information needed to remove and replace the Power Entry Modules
(PEMs). The G10 chassis is equipped with two AC or DC PEMs. They are installed in the
middle of the shelf’s front. Before replacing a PEM, verify that a second PEM is present with
both of its green notification LEDs lit. This second PEM will provide a single power supply path
during the replacement process.
Replacing a DC PEM
Hot power supplies may cause injury. Allow the PEM to cool before servicing.
Perform the following steps to replace a DC PEM.
Step
Action
1.
Put on an ESD wrist strap.
Electrostatic discharge can damage circuits or shorten their life. Before touching the blade
or electronic components, ensure that you are working in an ESD-safe environment.
2.
Connect the strap to the shelf by attaching the front or rear ESD jack/ESD snap.
3.
Switch the breaker of the PEM to be replaced to the OFF (tripped) position, if it
is not already in this position.
4.
Remove the power connection cables from the PEM.
5.
Unfasten the two captive screws of the PEM.
6.
Remove the PEM from the shelf bay by pulling the PEM handle.
7.
Switch the breaker on the replacement PEM to the OFF (tripped) position, if it is
not in this position already.
Inserting or extracting the PEM with the PEM breaker in the ON position may damage your
system. If power is connected to the shelf, ensure that the breaker is in the OFF position
before you insert or extract a PEM.
Controller or Expansion Module
SAS 300 GB, 600 GB, and 900 GB Disk Drives
NLS SAS 4T Disk Drives (SA210J)
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