Technical data

Dual 9-, 12-, and 20-Slot Power Supply

7-17

3. When the LED goes out, use a firm, steady pressure to seat

the power supply properly.

Caution

If the power supply does not seat smoothly, use a gentle

rocking motion to seat it. DO NOT back the unit out. If

you do back the unit out, restart this procedure from

step 2 to avoid resetting the system.

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

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

5. Reinstall the power supply bezel.

6. Connect 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 on.

GROUND

48V

+ | -

Clamping Contact

Screws