Figure 105: Connecting Dc Power Cables - Juniper T640 Hardware Manual

Copyright © 2017, Juniper Networks, Inc.
Verify that a licensed electrician has attached appropriate cable lugs to the DC power
3.
cables. See the DC power cable and lug specifications for your router for more
information.
Switch the power switch on the power supply faceplate to the standby position.
4.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
5.
Remove the nut and washer from each power terminal stud to be connected. If no
6.
washers and nuts are already installed, they should be in the accessory box.
Remove the captive screws on all three cable restraints on the right edge of the power
7.
supply faceplate (using a Phillips (+) screwdriver, number 2).
Route the negative (–) DC source power cables for
8.
INPUT 4 , over the smallest cable restraint on the far right. The cable restraint is marked
as follows top to bottom:
NOTE: You must route the cables in the locations as marked to be able
to replace the clear plastic cover over the terminal studs.
Attach the negative (–) DC source power cable lugs to the –48V (input) terminals
on the right: ,
INPUT 0 INPUT 1
terminal studs, first with the washers, then with the nuts. Using a 7/16-in. (11 mm) nut
driver, tighten the nuts. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of
torque to each nut.

Figure 105: Connecting DC Power Cables

Cable lug
Locking
washer
Nut
Chapter 22: Providing Power to the T640
INPUT 0
, ,
INPUT 0 INPUT 1 INPUT 3
, , and
INPUT 3 INPUT 4
Terminal studs
, , , and
INPUT 1 INPUT 3
, and ,
INPUT 4
. Secure the cable lugs to the
233