Juniper QFX10016, Руководство по оборудованию

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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.
9. Install each power cable lug on the DC power input terminal, securing it with the nut (see Figure
155 on page 307 ). Apply between 23 in.-lb (2.6 N-m) and 25 in.-lb (2.8 N-m) of torque to each nut.
(Use the 13/32 in. [10 mm] nut driver or socket wrench.)
a. Secure each positive (+) DC source power cable lug to the RTN (return) DC power input
terminal.
b. Secure each negative (–) DC source power cable lug to the –48V (input) DC power input
terminal.
Each power supply has two independent sets of DC power input terminals (INPUT 1: RTN –48V/–
60V: and INPUT 2: : RTN –48V/–60V). For feed redundancy, each power supply must be powered
by dedicated power feeds derived from feed INPUT 1 and feed INPUT 2. This configuration
provides the commonly deployed INPUT 1 / INPUT 2 feed redundancy for the switch. There is
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