Figure 109: Connecting Dc Power Cables; Figure 110: Connecting Negative (-) Dc Power Cables To Input 0, Input - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
238

Figure 109: Connecting DC Power Cables

Cable lug
Locking
washer
Nut
Figure 110: 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
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.
Replace the left cable restraint, and tighten the captive screw to hold the power cables
10.
for , ,
RTN 0 RTN 1 RTN 3
Terminal studs
INPUT 0 , INPUT 1 , INPUT 3
, , , and
RTN 1 RTN 3 RTN 4
RTN 4 . Secure the cable lugs to the terminal studs, first with
, and in place.
RTN 4
, and INPUT 4 in place.
RTN 0 , RTN 1 , RTN 3 , and RTN 4
.
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