Juniper SRX5800 Hardware Manual page 294

NOTE: The DC power supplies in slots PEM0 and PEM1 must be powered by dedicated
power feeds derived from feed A, and the DC power supplies in PEM2 and PEM3 must
be powered by dedicated power feeds derived from feed B. This configuration provides
the commonly deployed A/B feed redundancy for the system.
13. For standard-capacity DC power supplies, secure each DC power cable to its strain relief bracket as
follows:
a. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate.
b. Route the positive and negative DC power cables through the left and right sides of the cable
restraint.
c. Tighten the cable restraint captive screw to hold the power cables in place.
14. Replace the clear plastic cover over the terminal studs on the faceplate.
15. Verify that the power cabling is correct, that the cables are not touching, and that they do not block
access to services gateway components or drape where people could trip on them.
16. Switch on the dedicated customer site circuit breaker.
17. Verify that the input LEDs on the power supply indicate that the DC power is connected properly:
For a standard-capacity power supply, verify that the INPUT OK LED on the power supply is lit
steadily.
For a high-capacity power supply, verify that the INP0 OK or INP1 OK LEDs on the power supply
are lit green steadily. If using two feeds, verify that both INP0 OK and INP1 OK LEDs on the power
supply are lit steadily
NOTE: An input LED will be lit amber if that input's voltage is in reverse polarity. Check
the polarity of the power cables to fix the condition
18. Move the switch or circuit breaker on the DC power supply to the on (|) position .
19. Verify that the output LEDs on the power supply indicate that it is operating properly:
For a standard-capacity power supply, verify that the BREAKER ON and PWR OK LEDs are lit steadily.
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