Removing A Dc Pem - Dell Force10 E300 Installing And Maintaining

LED Status
Status Status
CC-E300-PWR-DC
Status Green—no fault detected
Amber— under voltage
Unlit—circuit not energized or circuit breaker open
Pwr In OK Green—no fault detected
Amber— polarity of (+) and (-) are reversed in external cables
Unlit—no power or power is under voltage

Removing a DC PEM

The left chassis PEM slot is labelled "0" and the right chassis PEM slot is labelled "1". For full
redundancy, each PEM must be attached to a dedicated circuit breaker. For example, PEM "0" connects
to circuit breaker "0" and PEM "1" connects to circuit breaker "1".
WARNING: Prevent exposure and contact with hazardous voltages. Do not attempt to operate this system
with the safety cover removed.
Step Task
1
Switch the Over Current Protector (located on the PEM front panel) to the OFF position.
2
Turn off power to the PEM. Ensure that the remote power source is in the OFF position and that the PEM Status
LED and Pwr In OK LED are off.
3
Loosen the retaining screw and remove PEM safety cover (see
4 Disconnect power cables attached to the PEM.
5
Slide the PEM out of the slot.
6
If you are not replacing the PEM, replace the empty slot with two blank panels.
24 | Installing Power Modules
Pwr In Pwr In
OK OK
Figure 5-3).