Figure 101: Connecting Dc Power Cables; Figure 102: Connecting Negative (-) Dc Power Cables To Input 0, Input 1; Input 3, And Input 4 - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
160
Route the negative (–) DC source power cables for
7.
, 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 –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 101: Connecting DC Power Cables

Cable lug
Locking
washer
Nut
Figure 102: 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
8.
hold the power cables for
Route the positive (+) DC source power cables for
9.
over the largest cable restraint on the left. The left cable restraint is marked as follows
from top to bottom
RTN 0
NOTE: You must route the cables 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 RTN terminals on the left:
RTN 0 , RTN 1 , RTN 3 , and
INPUT 0 , INPUT 1 , INPUT 3
, , and
INPUT 3 INPUT 4
Terminal studs
, ,
INPUT 0 INPUT 1 INPUT 3
RTN 0
, , , and
RTN 1 RTN 3 RTN 4
RTN 4 . Secure the cable lugs to the terminal studs, first with
, ,
INPUT 0 INPUT 1 INPUT 3
, and INPUT 4 .
. Secure the cable lugs to the
, and in place.
INPUT 4
, RTN 1 , RTN 3 , and RTN 4
.
Copyright © 2013, Juniper Networks, Inc.
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