Connecting Dc Power To The T1600 Router - Juniper T1600 Hardware Manual

T1600 Core Router Hardware Guide

Connecting DC Power to the T1600 Router

134
T1600 AC Power Requirements on page 358
You connect DC power to the router by attaching power cables from the DC power sources
to the terminal studs on the power supply faceplates. You must provide power cables
(the cable lugs are supplied with the router).
CAUTION: All inputs on the DC power supply in slot PEM0 must be powered
by dedicated power feeds derived from feed A, and all inputs on the DC power
supply in slot PEM1 must be powered by dedicated power feeds derived from
feed B. This configuration provides the commonly deployed A/B feed
redundancy for the system.
To connect the DC source power cables to the router, follow this procedure for each DC
power supply:
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to an approved site ESD grounding point. See the instructions for your site.
Switch off the customer site circuit breakers. Ensure that the voltage across the DC
2.
power source cable leads is 0 V and that there is no chance that the cable leads might
become active during installation.
Verify that a licensed electrician has attached the cable lugs provided with the router
3.
to the power cables.
Detach the ESD grounding strap from the approved site ESD grounding point, and
4.
connect the strap to one of the ESD points on the chassis.
Switch the circuit breakers on the power supply faceplate to the
5.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
6.
Remove the nut and washer from each power terminal stud. If no washers and nuts
7.
are already installed, they should be in the accessory box.
Attach the lugs on the DC source power cables to the terminal studs. Secure the cable
8.
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.
CAUTION: You must use an appropriate torque-controlled tool to tighten
the nuts. Applying excessive torque damages the terminal studs and the
power supply. The absolute maximum torque that may be applied to this
nut is 45 in-lb (5.0 Nm).
Attach the positive (+) DC source power cable lugs to the
a.
Attach the negative (–) DC source power cable lugs to the
b.
position (
OFF
RTN (return) terminals.
(input) terminals.
–48V
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