NOTE: The DC cable should be of minimum 14 AWG.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled (+) and (–) to indicate
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
terminals on the power supply.
5. Connect DC power cables to the A+ and A- terminals, as shown in Figure 26 on page 119:
a. Remove the screws and square washersfrom the A+ and A- terminals. Use a Phillips
(+) screwdriver, number 2. The square washers are permanently attached to the
screws.
b. Secure each power cable lug to the appropriate terminal with a screw. Apply
between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each screw.
•
Secure the positive (+) DC source power cable lug to the A+ (return) terminal.
•
Secure the negative (–) DC source power cable lug to the A- (input) terminal.
Copyright © 2016, Juniper Networks, Inc.118
SRX550 High Memory Services Gateway Hardware Guide
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