Alcatel 7750 SR-12, Installation Manual

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Appendix B: Field Replaceable Units
7750 SR-12
Page 141
R
EPLACING A
DC PEM
Figure 47: Replacing a DC PEM
To replace a DC PEM:
Step 1
Remove the new DC PEM from the packaging.
Step 2
Make sure that the switch on the PEM faceplate is in the OFF position.
Step 3
Verify that the remote power source is still OFF.
Step 4
Slide the PEM into the slot until the connectors are seated with the receptacle in the rear
of the slot.
Step 5 Secure into place by tightening the captive screws.
Step 6 Reconnect the VDC and RTN cables that are terminated with a UL-listed 2-hole lug with
1/4-inch (.635 cm) diameter holes on 3/4-inch (1.905 cm) spacing.
Step 7
Make sure that the VDC and RTN cables from each power supply is connected to separate
circuit breakers.
2
3
1
SR12012A