Juniper MX960 Hardware Manual page 563

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. For information about
connecting to DC power sources, see
Supply" on page
11. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate.
12. Route the positive and negative DC power cables through the left and right sides of the cable restraint.
13. Tighten the cable restraint captive screw to hold the power cables in place.
WARNING:
the PEM slot label. Make sure and note or mark the PEM slot once the power
supply is connected.
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 router components or drape where people could trip on them.
16. Switch on the dedicated customer site circuit breaker.
17. Verify that the INPUT OK LED on the power supply is lit steadily.
18. On each of the DC power supplies, switch the DC circuit breaker to the center position before moving
it to the on (|) position.
NOTE: The circuit breaker may bounce back to the off (O) position if you move the breaker
too quickly.
19. Verify that the BREAKER ON LED is lit steadily.
20. Verify that the PWR OK LED is lit steadily.
"Electrical Specifications for the MX960 DC Power
225.
Once the DC power supply is connected, the cable will be blocking
551