Technical data

7-14

Power Supplies

3. Remove the power supply bezel.

4. Loosen the two yellow, captive screws in the upper corners of

the power supply (see Figure 7-1 or Figure 7-2 on page 7-18).

5. Slide the power supply straight out of the chassis (see Figure

7-3 on page 7-19).

6. Slide the replacement power supply carefully into the

chassis. Use a firm, steady pressure to seat the connectors

properly.

7. Tighten the two yellow, captive screws in the upper corners

of the power supply.

8. Reinstall the power supply bezel.

9. Reconnect the power supply to the AC or DC power source:

– If the power supply is an AC unit, plug the power cord

back into the module in the rear of the XR chassis, then

into the AC outlet.

– If the power supply is a DC unit, clamp the DC leads to the

terminal block on the module and turn the -48Vdc power

source back on.

12- and 20-Slot Hot Swap Replacement

1. Remove the power supply bezel.

2. Disconnect the input power source from the power supply

being changed:

GROUND

48V

+ | -

Clamping Contact

Screws