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DC Power Entry Modules
The system requires a minimum of one load-sharing PEM to operate, but two are recommended for
redundancy. Connect the E600 PEMs to the appropriate branch circuit protection as defined by local
electrical codes.
For full redundancy, each PEM must be attached to an independent power source with a dedicated circuit
breaker.
Figure 6-5. DC Power Entry Module
Cable and Connector Requirements
1 You must provide your own cables to connect to a remote power source in your equipment rack.
Verify that your cables are:
• rated for at least 80A service to allow for a fully loaded E600i system at low input voltage per
your local electrical codes
• limit voltage drop across the cable length to 0.5V or less
2 Before you make the cable connections, apply a coat of anti-oxidant paste to unplated metal contact
surfaces.
3 File unplated connectors, braided straps, and bus bars to a shiny finish. It is not necessary to file and
coat tinned connectors or other plated connection surfaces, such as on the PEM studs.
Install the DC PEMs
To install a DC PEM:
Step Task
1 Make sure that the remote power source (the circuit breaker panel) is in the OFF position.
2 Make sure that the over current protector (located on the PEM front panel) is in the OFF position.
48V in
48V in
Status
Status
-48/-60Vdc 75A
-48/-60Vdc 75A
CAUTION -
CAUTION -
Use copper
Use copper
conductors only
conductors only
CC-E600-PWR-DC
Voltage LED
Status LED
Studs
Over Current Protecto
r
Finger Barrier
Locking Screws
Handle