Juniper MX960 Hardware Guide

If you plan to operate a DC-powered router at less than the maximum configuration, we recommend that
you provision a circuit breaker according to respective National Electrical 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.
RELATED DOCUMENTATION
MX960 DC Power Supply | 140
MX960 DC Power Electrical Safety Guidelines
Electrical Specifications for the MX960 DC Power Supply | 225
DC Power Source Cabling for the MX960 Router
Figure 53 on page 242 shows a typical DC source cabling arrangement.
Figure 53: Typical DC Source Cabling to the Router
The DC power supplies in slots PEM0 and PEM1 must be powered by dedicated power feeds derived
from feed A, and the DC power supplies in slots PEM2 and PEM3 must be powered by dedicated power
feeds derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for
the system.
242

Juniper MX960 Specifications

General

Power Supply	AC or DC
Redundancy	Yes
Operating System	Junos OS
Form Factor	Rack-mountable
Operating Humidity	5% to 90% non-condensing
Chassis Type	Modular
Slots	12
Interfaces/Ports	Varies with line cards
Operating Temperature	0°C to 40°C (32°F to 104°F)
Routing Engine	Redundant Routing Engines
Interfaces	Supports various interface modules