Juniper MX240 - DC Power Source Cabling for the MX240 Router; Figure 46: Typical DC Source Cabling to the Router

Related
Documentation
Tools and Parts Required for MX240 Router Grounding and Power Connections on
page 197
•
• Grounding the MX240 Router on page 198
• Preventing Electrostatic Discharge Damage to an MX240 Router on page 444
DC Power Source Cabling for the MX240 Router
Figure 46 on page 159 shows a typical DC source cabling arrangement.
Figure 46: Typical DC Source Cabling to the Router
The DC power supply in PEM0 must be powered by a dedicated power feed derived from
feed A, and the DC power supply in PEM2 must be powered by a dedicated power feed
derived from feed B. This configuration provides the commonly deployed A/B feed
redundancy for the system.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled (+) and (–) to indicate
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.
Related
Documentation
MX240 DC Power Supply Description on page 92•
159Copyright © 2017, Juniper Networks, Inc.
Chapter 13: DC Power Requirements and Specifications