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
terminal studs on each power supply.
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
redundancyfor the system.Forinformation about connecting to DC power
sources, see DC Power Supply Electrical Specifications for the MX960
Router.
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.
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, move the switch to the on (|) position.
NOTE: The switch may bounce back to the off (O) position if you move
the breaker too quickly.
19. Verify that the DC OK LED is lit steadily.
Copyright © 2010, Juniper Networks, Inc.32
Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays
To Next Page
Loading...
Need help?
General
