Figure 18: Connecting Negative (–) DC Power Cables to INPUT 2 and
INPUT 5
11. Route the positive (+) DC source power cables for RTN 2 and RTN 5 over the middle
cable restraint. The middle cable restraint is marked as follows from top to bottom:
INPUT 2, RTN 2, RTN 5, and INPUT 5.
NOTE: You must route the cables as marked to be able to replace the
clear plastic cover over the terminal studs.
Attach the positive (+) DC source power cable lugs RTN 2 and RTN 5 to the RTN
(return) terminals on the left. Secure the cable lugs to the 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.
12. Replace the middle cable restraint, and tighten the captive screw to hold the power
cables for INPUT 2, INPUT 5, RTN 2, and RTN 5 in place.
13. Route the positive (+) DC source power cables for RTN 0, RTN 1, RTN 3, and RTN 4
over the largest cable restraint on the left. The left cable restraint is marked as follows
from top to bottom: RTN 0, RTN 1, RTN 3, and RTN 4.
NOTE: You must route the cables as marked to be able to replace the
clear plastic cover over the terminal studs.
Attach the positive (+) DC source power cable lugs to the RTN 0, RTN 1, RTN 3, and
RTN 4 terminals on the left. Secure the cable lugs to the 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.
14. Replace the left cable restraint, and tighten the captive screw to hold the power cables
for RTN 0, RTN 1, RTN 3, and RTN 4 in place.
33Copyright © 2015, Juniper Networks, Inc.
Connecting Power to a T640 Router with Six-Input DC Power Supplies
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