Figure 93: Connecting Dc Power Cables; Figure 94: Connecting Negative (-) Dc Power Cables To Input 0, Input 1 - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
152
Route the negative (–) DC source power cables for
8.
over the smallest cable restraint on the far right. The cable restraint is marked
INPUT 4
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 –48 V (input) terminals on the right. Secure the cable lugs to the
INPUT 4
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 93: Connecting DC Power Cables

Cable lug
Locking
washer
Nut
Figure 94: Connecting Negative (–) DC Power Cables to INPUT 0, INPUT 1,
INPUT 3, and INPUT 4
Replace the smallest cable restraint on the far right, and tighten the captive screw to
9.
hold the power cables for
Route the negative (–) DC source power cables for
10.
middle cable restraint. The middle cable restraint is marked as follows from top to
bottom: ,
INPUT 2 RTN 2
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 –48 V (input) terminals
on the right. Secure the cable lugs to the terminal studs, first with the washers, then
INPUT 0 , INPUT 1 , INPUT 3
Terminal studs
, ,
INPUT 0 INPUT 1 INPUT 3
, , and .
RTN 5 INPUT 5
, ,
INPUT 0 INPUT 1 INPUT 3
, and INPUT 4 .
, ,
INPUT 0 INPUT 1 INPUT 3
, and in place.
INPUT 4
and through the
INPUT 2 INPUT 5
Copyright © 2013, Juniper Networks, Inc.
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