Installing A T640 Three-Input 240-A Dc Power Supply; Figure 179: Installing A Three-Input 240-A Dc Power Supply - Juniper T640 Hardware Manual

Installing a T640 Three-Input 240-A DC Power Supply

Replacing the T640 Cable Restraint on a Three-Input 240-A DC Power Supply
Copyright © 2017, Juniper Networks, Inc.
Each three-input 240-A DC power supply weighs approximately 25 lb (11.3 kg). To install
a three-input 240-A power supply:
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.
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 breakers on the power supply faceplate to the
3.
Using both hands, slide the power supply into the chassis until you feel resistance
4.
(see Figure 179 on page
Twist the ejector handles at the upper corners of the power supply faceplate clockwise
5.
until they stop.
Tighten the captive screws at the lower corners of the power supply faceplate to
6.
secure the power supply in the chassis.

Figure 179: Installing a Three-Input 240-A DC Power Supply

Each three-input 240-A DC power supply is shipped with the standard cable restraint,
as shown in "Standard Cable Restraint on a Three-Input 240-A Power Supply" on page
Two optional cable restraints are shipped in the accessory box.
If your DC power cables are too large or inflexible to fit into the standard cable restraint,
we recommend that you remove the standard cable restraint and install the optional
Chapter 29: Replacing Power System Components
361).
OFF position ( O ).
362.
361