Juniper SRX5400 Hardware Manual page 83

Copyright © 2014, Juniper Networks, Inc.
Chapter 9: Grounding and Providing Power to the SRX5400 Services Gateway
The cable with very low resistance (indicating a closed circuit) to chassis ground is
.
RTN
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.
Remove the nuts and washers from the terminal studs. (Use a 7/16-in. (11 mm) nut
7.
driver or socket wrench.)
Secure each power cable lug to the terminal studs, first with the flat washer, then
8.
with the nut (see Figure 31 on page
(2.8 Nm) of torque to each nut. (Use a 7/16-in. (11 mm) nut driver or socket wrench.)
a. Secure each positive (+) DC source power cable lug to the
b. Secure each negative (–) DC source power cable lug to the
The DC power supplies in slots
feeds derived from feed
be powered by dedicated power feeds derived from feed
the commonly deployed
Route the power cables along the cable restraint toward the left or right corner of the
9.
chassis. If needed, thread plastic cable ties, which you must provide, through the
openings on the cable restraint to hold the power cables in place.
Replace the clear plastic cover over the terminal studs on the faceplate.
10.
Verify that the power cables are connected correctly, that they are not touching or
11.
blocking access to device components, and that they do not drape where people
could trip on them.
Repeat Steps 3 through
12.
70). Apply between 23 lb-in. (2.6 Nm) and 25 lb-in.
and must be powered by dedicated power
PEM0 PEM1
A , and the DC power supplies in slots
feed redundancy for the system.
A/B
11 for the remaining power supplies.
and to indicate
(+) (–)
(return) terminal.
RTN
(input) terminal.
–48V
PEM2 and PEM3 must
. This configuration provides
B
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