Figure 137: Four-Input 240-A Dc Power Supply - Juniper T640 Hardware Manual

Copyright © 2010, Juniper Networks, Inc.

Figure 137: Four-Input 240-A DC Power Supply

LEDs Circuit breakers
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
4.
Using a 7/16-in. (11 mm) nut driver, remove the nuts and washers from the terminal
5.
studs (see Figure 138 on page 256).
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
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.
Chapter 17: Replacing T640 Router Hardware Components
(+) and (–) to indicate
255