T640 Dc Power Distribution - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Related
Documentation

T640 DC Power Distribution

130
Example of calculating system thermal output:
Watts DC/0.293 = BTU/hr
6283/0.293 = 21,444 BTU/hr
T640 Power System Description on page 95
T640 DC Power System Electrical Specifications on page 125
T640 DC Power Supply Electrical Specifications on page 126
T640 General Electrical Safety Guidelines and Electrical Codes on page 529
Most sites distribute DC power through a main conduit that leads to frame-mounted DC
power distribution panels, one of which might be located at the top of the rack that
houses the router. A pair of cables (one input and one return) connects each set of
terminal studs to the power distribution panel.
NOTE: All inputs on the two-input 160-A DC power supply in slot
be powered by dedicated power feeds derived from feed A, and all inputs on
the two-input 160-A DC power supply in slot
dedicated power feeds derived from feed B. This configuration provides the
commonly deployed A/B feed redundancy for the system.
NOTE:
INPUT 0
slot must be powered by dedicated power feeds derived from feed A,
PEM0
and INPUT 0 and
must be powered by dedicated power feeds derived from feed B. This
PEM1
configuration provides the commonly deployed A/B feed redundancy for the
system.
NOTE: All inputs on the four-input 240-A DC power supply in slot
be powered by dedicated power feeds derived from feed A, and all inputs on
the four-input 240-A DC power supply in slot
dedicated power feeds derived from feed B. This configuration provides the
commonly deployed A/B feed redundancy for the system.
NOTE: All inputs on the six-input DC power supply in slot
powered by dedicated power feeds derived from feed A, and all inputs on
the six-input DC power supply in slot
power feeds derived from feed B. This configuration provides the commonly
deployed A/B feed redundancy for the system.
and on the three-input 240-A DC power supply in
INPUT 1
INPUT 1 on the three-input 240-A DC power supply in slot
PEM1
PEM0
PEM1 must be powered by
PEM0
PEM1 must be powered by
must be
PEM0
must be powered by dedicated
Copyright © 2017, Juniper Networks, Inc.
must
must