Dc Power Source Cabling For The Mx480 Router; Figure 16: Typical Dc Source Cabling To The Router - Juniper MX480 Hardware Manual

DC Power Source Cabling for the MX480 Router

See Also
Copyright © 2019, Juniper Networks, Inc.
Code and customer site internal standards to maintain proper level of protection for the
current specified above or each DC power supply rated for at least 125% of the continuous
current that the system draws at –48 VDC.
Figure 16 on page 57 shows a typical DC source cabling arrangement.

Figure 16: Typical DC Source Cabling to the Router

The DC power supplies in
derived from feed A , and the DC power supplies in
dedicated power feeds derived from feed
deployed feed redundancy for the system.
A/B
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.
WARNING: For field-wiring connections, use copper conductors only.
CAUTION: Power cords and cables must not block access to device
components or drape where people could trip on them.
In Case of an Electrical Accident
Connecting Power to a DC-Powered MX480 Router with Normal Capacity Power
Supplies on page 207
Replacing an MX480 DC Power Supply Cable on page 327
and must be powered by dedicated power feeds
PEM0 PEM1
PEM2
. This configuration provides the commonly
B
Chapter 1: Overview
and PEM3 must be powered by
and to indicate
(+) (–)
57