Providing Power To A Seven-Input 420-A Power Supply; Connecting Power To A Seven-Input 420-A Power Supply; Figure 75: Removing The Input Power Tray - Juniper TX MATRIX PLUS Hardware Manual

Providing Power to a Seven-Input 420-A Power Supply

Connecting Power to a Seven-Input 420-A Power Supply

Copyright © 2010, Juniper Networks, Inc.
Connecting Power to a Seven-Input 420-A Power Supply on page 167
1.
Powering On the TX Matrix Plus Router on page 171
2.
The input power tray weighs 3.7 lb (1.7 kg).
To connect the DC source power cables to the seven-input 420-A power supply:
Ensure that the voltage across the DC power source cable leads is 0 V and that there
1.
is no chance that the cable leads might become active during installation.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to to one of the ESD points on the chassis.
Switch the circuit breakers on the power supply faceplate to the
3.
Loosen the captive screws that fasten the input power tray to the power supply.
4.

Figure 75: Removing the Input Power Tray

Grasp the metal handle of the input power tray and pull it down toward you.
5.
Remove the input power tray from the power supply.
6.
Use a Philips screwdriver to loosen screws on the metal input power tray cover.
7.
Remove the metal input power tray cover.
8.
Remove the power lug separator.
9.
Remove the cable restraint.
10.
Remove the nuts and washers from the power terminal studs on the lower row.
11.
Attach the negative (–) DC source power cable lugs to the
12.
the lower row (see Figure 76 on page 169).
Chapter 13: Grounding and Providing Power to the TX Matrix Plus Router
Loosen captive screws.
Input power tray
position ( ).
OFF O
–48V (input) terminals on
167