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CAUTION: You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled (+) and (–) to indicate their polarity. There
is no standard color coding for DC power cables. The color coding used by the external
DC power source at your site determines the color coding for the leads on the power
cables that attach to the terminal studs on each power supply.
5. Using a 7/16-in. nut driver or pliers, remove the nuts and washers from the
terminal studs (see Figure 10 on page 19).
Figure 10: Disconnecting Power Cables From the DC Power Supply
6. Remove the cable lugs from the terminal studs.
7. Loosen the captive screws on the cable restraints on the right edge of the power
supply faceplate.
8. Carefully move the power cables out of the way.
9. Loosen the captive screws on the lower corners of the power supply faceplate
completely.
10. Twist the ejector handles on the upper corners of the faceplate counterclockwise
to unseat the power supply.
WARNING: Do not touch the power connectors on the rear of the power supply (see
Figure 11 on page 20). They can contain dangerous voltages.
Upgrading the DC Power Supplies ■ 19
Upgrading the DC Power Supplies