Juniper MX480, Hardware Manual

Page: 324 / 420

Figure 138: Removing a DC Power Supply from the Router
Installing an MX480 DC Power Supply
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the off position, and tape the switch handle of the circuit breaker
in the off position.
To install a DC power supply (see Figure 139 on page 326 ):
1.
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.
2.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
3.
Move the DC circuit breaker on the power supply faceplate to the off (
O
) position.
4.
Using both hands, slide the power supply straight into the chassis until the power
supply is fully seated in the chassis slot. The power supply faceplate should be flush
with any adjacent power supply faceplate or blank installed in the power supply slot.
5.
Tighten the captive screws on the lower edge of the power supply faceplate.
6.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
7.
Remove the nut and washer from each of the terminal studs.
8.
Secure each power cable lug to the terminal studs, first with the flat washer, then
with the split washer, and then with the nut (see
Figure 140 on page 327 ). Apply between
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MX480 Universal Routing Platform Hardware Guide