Juniper SRX5400, Hardware Manual

Page: 333 / 394

Replacing an SRX5400 Services Gateway DC Power Supply Cable
To replace an SRX5400 Services Gateway DC power supply cable, perform the following
procedures:
1.
Disconnecting an SRX5400 Services Gateway DC Power Supply Cable on page 307
2.
Connecting an SRX5400 Services Gateway DC Power Supply Cable on page 307
Disconnecting an SRX5400 Services Gateway DC Power Supply Cable
To remove a power cable from a DC power supply:
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect
the strap to an approved site ESD grounding point.
2.
Switch off the external circuit breakers for all the cables attached to the power supply.
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 the removal process.
3.
Remove the power cable from the DC power source.
4.
Detach the ESD grounding strap from the site ESD grounding point, and connect the
strap to one of the ESD points on the chassis.
5.
Switch the circuit breaker on the power supply faceplate to the
OFF
position
O
.
6.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
7.
Remove the nut and washer from the terminal studs. (Use a 7/16–in. nut driver or
pliers.)
8.
Remove the cable lug from the terminal studs.
9.
Loosen the captive screws on the power supply faceplate.
10.
Carefully move the power cable out of the way.
Connecting an SRX5400 Services Gateway DC Power Supply Cable
To install a replacement power cable for a DC power supply (see Figure 127 on page 308 ):
1.
Locate a replacement power cable that meets the specifications defined in “DC Power
Cable Specifications for the SRX5400 Services Gateway” on page 116 .
2.
Verify that a licensed electrician has attached a cable lug to the replacement power
cable.
3.
Verify that the
INPUT OK
LED is off.
4.
Secure the power cable lug to the terminal studs, first with the flat washer, then with
the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each
nut, (see
Figure 127 on page 308 ).
5.
Route the power cable along the cable restraint toward the left or right corner of the
chassis. If needed, thread plastic cable ties, which you must provide, through the
openings on the cable restraint to hold the power cables in place.
307 Copyright © 2017, Juniper Networks, Inc.
Chapter 31: Replacing Power System Components