Figure 121: Rear of the Power Supply Showing Midplane Connectors
Installing a TX Matrix Two-Input 160-A Power Supply
To install a power supply (see Figure 122 on page 274):
1.
Make sure that the voltage across the DC power source cable leads is 0 V and that
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
(+)
and
(–)
to indicate
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.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
3.
Switch the circuit breakers on the power supply faceplate to the off position (
O
).
4.
Using both hands, slide the power supply into the chassis until you feel resistance.
5.
Twist the ejector handles at the upper corners of the power supply faceplate clockwise
until they stop.
6.
Tighten the captive screws at the lower corners of the power supply faceplate to
secure the power supply in the chassis.
7.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
8.
Remove the nut and washer from each power terminal stud. If no washers and nuts
are already installed, they should be in the accessory box.
9.
Secure the cable lug on the DC power cable to the terminal stud, first with a washer,
then with a nut (see Figure 123 on page 275). Use a 7/16-in. (11 mm) nut driver or wrench
Copyright © 2010, Juniper Networks, Inc.
272
TX Matrix Hardware Guide
Summary of Contents for TX MATRIX
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