Dc Power Source Cabling For The Mx240 Router; Figure 45: Typical Dc Source Cabling To The Router - Juniper mx240 Hardware Manual

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DC Power Source Cabling for the MX240 Router

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Documentation
Copyright © 2016, Juniper Networks, Inc.
Tools and Parts Required for MX240 Router Grounding and Power Connections on
page 193
Grounding the MX240 Router on page 194
Preventing Electrostatic Discharge Damage to an MX240 Router on page 416
Figure 45 on page 157 shows a typical DC source cabling arrangement.

Figure 45: Typical DC Source Cabling to the Router

The DC power supply in PEM0
feed , and the DC power supply in
A
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.
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.
MX240 DC Power Supply Description on page 88
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power
Supplies on page 197
Chapter 13: DC Power Requirements and Specifications
must be powered by a dedicated power feed derived from
must be powered by a dedicated power feed
PEM2
feed
A/B
and to indicate
(+) (–)
157