To connect five 60-A DC source power cables to the router, follow this procedure for
each DC power supply:
1.
Verify that a properly rated customer site circuit breaker for each DC power cable has
been installed. See the DC power electrical safety guidelines for your router for more
information.
2.
Switch off the customer site circuit breakers. Ensure that the voltage across the DC
power source cable leads is 0 V and that there is no chance that the cable leads might
become active during installation.
3.
Verify that a licensed electrician has attached appropriate cable lugs to the DC power
cables. See the DC power cable and lug specifications for your router for more
information.
4.
Switch the power switch on the power supply faceplate to the standby position.
5.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
6.
Remove the nut and washer from each power terminal stud to be connected. If no
washers and nuts are already installed, they should be in the accessory box.
7.
Remove the captive screws on all three cable restraints on the right edge of the power
supply faceplate (using a Phillips (+) screwdriver, number 2).
8.
Route the negative (–) DC source power cables for
INPUT 0
,
INPUT 1
,
INPUT 3
, and
INPUT 4
, over the smallest cable restraint on the far right. The cable restraint is marked
as follows top to bottom:
INPUT 0
,
INPUT 1
,
INPUT 3
, and
INPUT 4
,
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
,
INPUT 3
, and
INPUT 4
. 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.
Figure 73: Connecting DC Power Cables
g006353
Terminal studs
Cable lug
Locking
washer
Nut
127
Copyright © 2013, Juniper Networks, Inc.
Chapter 13: Providing Power to the T4000 Router
Содержание T4000 -
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