Juniper MX960 Hardware Manual page 642

CAUTION:
damage to the power supply.
4. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that
the cable leads might become active during installation.
5. Ensure that the release lever below the empty power supply slot is locked in the counterclockwise
position.
If necessary, pull the spring-loaded locking pin in the release lever away from the chassis and turn the
release lever counterclockwise until it stops. Let go of the locking pin in the release lever. Ensure that
the pin is seated inside the corresponding hole in the chassis.
6. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated
in the chassis slot.
The small tab on the metal housing that is controlled by the release lever must be inside of the
corresponding slot at the bottom of the power supply. This tab is used to pull the power supply down
in the chassis slot, prior to removing the power supply.
7. While firmly pushing the handle on the power supply faceplate with one hand, use your other hand to
pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever
clockwise until it stops.
8. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding
hole in the chassis.
9. Remove the cover protecting the terminal studs on the faceplate.
10. Remove the nut and washer from each of the terminal studs.
11. Secure each power cable lug to the terminal studs, first with the split washer, then with the nut. Apply
between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut. Do not overtighten the nut.
(Use a 7/16-in. [11-mm] torque-controlled driver or socket wrench.)
a. On INPUT 0, attach the positive (+) DC source power cable lug to the RTN (return) terminal as
shown in Figure 117 on page
b. On INPUT 0 attach the negative (–) DC source power cable lug to the -48V (input) terminal. Repeat
this step for INPUT 1 if using two feeds.if using two feeds.
Do not use a pencil, because fragments can break off and cause
346. Repeat this step for INPUT 1 if using two feeds.
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