Juniper TX Matrix Plus Quick Start Manual page 25

Copyright © 2015, Juniper Networks, Inc.
Step 8: Connect Power to a Seven-Input 420-A Power Supply in a TX Matrix Plus Router
Remove the metal input power tray cover.
9.
Remove the power lug separator.
10.
Remove the cable restraint.
11.
Remove the nuts and washers from the power terminal studs on the lower row.
12.
Attach the negative (–) DC source power cable lugs to the
13.
the lower row (see Figure 13 on page
Use a 7/16-in. (11 mm) nut driver or wrench to tighten the nut. 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 power
supply. The maximum torque that may be applied to this nut is 25 in-lb
(2.8 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.
CAUTION: All inputs on the DC power supply in slot
powered by dedicated power feeds derived from feed A, and all inputs on
the DC power supply in slot
feeds derived from feed B. This configuration provides the commonly
deployed A/B feed redundancy for the system.
–48V
26).
(+)
must be powered by dedicated power
PEM1
(input) terminals on
and to indicate
(–)
PEM0 must be
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