24 | Installing Power Modulesw w w . d e l l . c o m | s u p p o r t . d e l l . c o m LED StatusRemoving a DC PEMThe left chassis PEM slot is labelled “0” and the right chassis PEM slot is labelled “1”. For fullredundancy, each PEM must be attached to a dedicated circuit breaker. For example, PEM “0” connectsto 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 systemwith the safety cover removed.Status Green—no fault detectedAmber— under voltageUnlit—circuit not energized or circuit breaker openPwr In OK Green—no fault detectedAmber— polarity of (+) and (-) are reversed in external cablesUnlit—no power or power is under voltageStep Task1 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 StatusLED and Pwr In OK LED are off.3 Loosen the retaining screw and remove PEM safety cover (see Figure 5-3).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.CC-E300-PWR-DCPwr InPwr InOKOKStatusStatusfn00118ch4
