Dc Power Source Cabling And Cable Specifications For The Mx240; Router; Dc Power Source Cabling For The Mx240 Router; Figure 124: Typical Dc Source Cabling To The Router - Juniper MX240 Hardware Manual

MX240 3D Universal Edge Router Hardware Guide
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DC Power Source Cabling and Cable Specifications for the MX240 Router
278
If you plan to operate a DC-powered router at less than the maximum configuration and
do not provision a 40 A (–48 VDC) circuit breaker, we recommend that you provision a
dedicated customer site circuit breaker for each DC power supply rated for at least 125%
of the continuous current that the system draws at –48 VDC.
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power
Supplies on page 104
Installing an MX240 DC Normal Capacity Power Supply on page 212
DC Power Disconnection Warning for M Series, MX Series, and T Series Routers
DC Power Source Cabling for the MX240 Router on page 278
DC Power Cable Specifications for the MX240 Router on page 279
DC Power Source Cabling for the MX240 Router on page 278
DC Power Cable Specifications for the MX240 Router on page 279

DC Power Source Cabling for the MX240 Router

Figure 124 on page 278 shows a typical DC source cabling arrangement.

Figure 124: Typical DC Source Cabling to the Router

The DC power supply in
PEM0
feed A , and the DC power supply in
derived from feed . This configuration provides the commonly deployed
B
redundancy for the system.
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.
must be powered by a dedicated power feed derived from
PEM2 must be powered by a dedicated power feed
Copyright © 2013, Juniper Networks, Inc.
feed
A/B
and to indicate
(+) (–)