Installing An M320 Dc Power Supply; Figure 106: Removing A Dc Power Supply - Juniper M320 Hardware Manual

M320 Multiservice Edge Router Hardware Guide

Figure 106: Removing a DC Power Supply

Installing an M320 DC Power Supply

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CAUTION: Each power supply weighs approximately 10 lb (4.5 kg). Be
prepared to support the full weight of the power supply as you remove it
from the router.
To install a DC power supply (see
Make sure that the voltage across the DC power source cable leads is 0 V and that
1.
there is no chance that the cables might become active during installation.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
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.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Switch the circuit breaker on the DC power supply faceplate to the off position (
3.
Using both hands, slide the power supply into the chassis until you feel resistance.
4.
Firmly push the power supply into the chassis until it comes to a stop. The power
5.
supply faceplate should be flush with any adjacent power supply faceplates.
Tighten the captive screws on each side of the power supply faceplate to secure the
6.
power supply in the chassis.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
7.
Remove the nuts and washers from the terminal studs.
8.
Figure 107 on page 253):
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