this section describes how to install a dc-input power supply.

    required tools

    you will need the following tools to perform this procedure:

    1 a phillips screwdriver

    2 a 10-mm wrench/socket

    3 connectors and wire for the dc circuit or circuits

    installation procedure

    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

    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

    use copper conductors only. statement 1025

    when stranded wiring is required, use approved wiring terminations, such as closed-loop or spade-type with upturned lugs. these terminations should be the appropriate size for the wires and should clamp both the insulation and conductor. statement 1002

    follow these steps to install a dc-input power supply, connect it to a power source, and verify its operation:

    step 1 verify that power is off to the dc circuit or circuits on the power supply you are installing.

    step 2 grasp the power supply handle with one hand. place your other hand underneath it as you slowly insert the power supply into the bay (as shown earlier in figure 4-16).

    step 3 using a screwdriver, tighten the captive screws on the power supply (see figure 4-15).

    step 4 before you connect the power supply to a power source, ensure that all site power and grounding requirements have been met.

    step 5 connect the dc-input wires to the power supply terminal block. the proper wiring sequence is ground to ground, positive to positive, and negative to negative (see figure 4-13 or figure 4-14 depending on your installation).

    the 1400w triple-input power supply has two grounding posts; use the one that is most convenient for your installation.

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

    step 6 replace the terminal cover.

    step 7 connect the other end of the power cords to a dc-power input source.

    in a system with multiple power supplies or a single triple-input power supply,connect each power supply to a separate dc power source. in the event of a power source failure, if the second source is still available, it can maintain maximum overcurrent protection for each power connection.

    step 8 verify power supply operation by checking the power supply’s front-panel leds. you should see the following:

    1.the led labeled input ok is green.

    2.the led labeled output fail is not lit.

    step 9 check the power supply and system status from the system console by entering the show system command (catalyst operating system) or the show power command (cisco ios). for more information on these commands, refer to the command reference publication for your switch and software.

    step 10 if the leds or the show system command (catalyst operating system) or the show power command (cisco ios) output indicate a power problem or other system problem, see chapter 5, “troubleshooting,” for more information.