Procedure

Installation

Connecting a DC Power Supply

Warning

Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

Use copper conductors only. Statement 1025

This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations. Statement 1045

When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046

Installation of the equipment must comply with local and national electrical codes. Statement 1074

Hazardous voltage or energy may be present on DC power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1075

Step 1 Install the DC power supply in the chassis, making note of the bay number, so you are sure to connect the wiring to the appropriate terminals on the DC PDU at the chassis rear.

Step 2 Verify that power is off to the DC circuit or circuits on the power supply that you are installing. Step 3 Ensure that all site power and grounding requirements have been met.

Step 4 Remove the plastic cover from the DC terminals by squeezing the flanges at the top and bottom of the cover.

Step 5 Connect the ground wires to the power supply terminal block, shown as a green wire below. Only one ground connection is required, though there may be up to four DC connections.

Step 6 Connect the DC-input wires to the power supply terminal block. The proper wiring sequence is positive to positive (red wire), and negative to negative (black wire). The figure below shows a connection to terminal 1.

Cisco UCS 5108 Server Chassis Installation Guide

OL-20035-05