Field Replaceable Units
7450 ESS-7 Page 127
REPLACING AN AC PEM
For added safety, before installing the PEM replacement, verify that the circuit breaker (ON/OFF)
for the new PEM is in the OFF ( O ) position.
Figure 44: Replacing an AC PEM
To install a PEM replacement:
Step 1 Remove the AC PEM from the packaging and place on an anti-static surface.
Step 2 Verify that the circuit breaker (ON/OFF) on the PEM is in the OFF ( O ) position.
Step 3 Align the module with the guides in power slot (1 or 2) that corresponds to the slot in
which the AC PSM populates. For example, if the PSM is installed in front power slot 1,
install the AC PEM in rear power slot 1.
Slide the PEM into the slot and firmly press the unit all the way into the slot. Tighten the
captive screws.
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