Dell Force10 E600i E600 TeraScale Installation Guide - Page 25

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 Voltage LED Status LED Handle Studs 48V in Status Over Current Protector CC-E600-PWR-DC Finger Barrier CAUTION - Use copper conductors only -48/-60Vdc 75A Locking Screws 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. Power Supply | 25