Connecting Dc Power To The T4000 Router (Five 60-A Inputs) - Juniper T4000 Hardware Manual

T4000 Core Router Hardware Guide
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Connecting DC Power to the T4000 Router (Five 60-A Inputs)

190
Tools and Parts Required to Provide Power to the T4000 Router on page 185
Connecting DC Power to the T4000 Router (Five 60-A Inputs) on page 190
Connecting DC Power to the T4000 Router (Four 60-A Inputs) on page 194
Connecting DC Power to the T4000 Router (Three 80-A DC Power Cables to Six 60-A
Inputs) on page 198
Powering On the T4000 Router on page 207
Configuring DC Power on a T4000 Router on page 213
Troubleshooting the T4000 Power System on page 363
T4000 DC Power Electrical Safety Guidelines on page 424
T4000 DC Power Cable and Lugs Specifications on page 105
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: Do not use a terminal jumper for 60-A DC power cables. Using a
terminal jumper is not supported for this procedure. Doing so will cause a
short across the inputs and trip your external circuit breaker.
CAUTION: All connected inputs on the DC power supply in slot PEM0 must
be powered by dedicated power feeds derived from feed A, and all connected
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.
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 lb-in. (5.0 Nm).
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the terminal
studs on each power supply.
and to indicate
(+) (–)
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