Juniper SRX550, Hardware Manual

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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:
a. Remove the screws and square washers from 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.
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