T640 Dc Power Distribution - Juniper T640 Hardware Manual
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T640 DC Power Distribution
Copyright © 2010, Juniper Networks, Inc.
CAUTION: Power cables must not block access to router components or
drape where people could trip on them.
T640 Power System Description on page 49
T640 DC Power System Electrical Specifications on page 347
T640 DC Power Supply Electrical Specifications on page 348
General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and
T Series Routers on page 324
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
PEM0
must be powered by dedicated power feeds derived from feed A,
and
and
INPUT 0
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.
Figure 181 on page 354 and Figure 182 on page 354 shows a typical DC source cabling
arrangement.
Appendix D: T640 Power Guidelines, Requirements, and Specifications
and
on the three-input 240-A DC power supply in
INPUT 1
on the three-input 240-A DC power supply in slot
INPUT 1
PEM0
must be powered by
PEM1
PEM0
must be powered by
PEM1
must
must
353
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