Juniper PTX5000 Quick Start Manual page 44

CAUTION:
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.
CAUTION:
power feeds derived from feed A, and all inputs on the DC PDU in slot PDU1 must
be powered by dedicated power feeds derived from feed B. This configuration provides
the commonly deployed A/B feed redundancy for the system.
9. Connect the negative (–) DC source power cable to the -48 V/60A input terminal (see
Figure 35 on page 43). Using a 7/16-in. (11-mm) nut driver, tighten the nut to secure the cable lug to
the input terminal.
10. Verify that the source power cables are connected to the appropriate terminal: the positive (+) source
cable to the return terminals (labeled RTN) and the negative (–) source cable to the input terminals
(labeled –48V/60A).
11. Replace the terminal block safety cover and ensure that the cables fit into the slots of the safety cover.
12. Repeat the procedure for the input power terminals for all the PSMs in the PDU.
13. Repeat the procedure for the other PDU.
14. Verify that the DC power cables do not touch or block access to the components, and that they do not
drape where people could trip on them.
You must ensure that power connections maintain the proper polarity.
All inputs on the DC PDU in slot PDU0 must be powered by dedicated
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