Juniper M Series User Manual

Table 141: Router Power Supply Characteristics per Routing Platform (continued)
TX
Matrix/TX
Matrix
Plus
T640/
T1600T320M320M160M120M40eM40M20
M7i/
M10i
M5/
M10
Power
Supply
Characteristic
No
DC only
No;
DC
only
(T640)
Yes
(T1600)
No;
DC
only
YesNo;
original
or
enhanced
DC only
YesYesYesYesYesYesSupports both
AC and DC
power
supplies
For more information about checking for power supply alarms, see “Checking for Power
Supply Alarms” on page 301.
Related
Documentation
Checklist for Monitoring Redundant Power Supplies on page 607•
M5/M10 Router Redundant Power Supplies
Two load-sharing, isolated power supplies are located at the bottom rear of the M5 and
M10 router chassis. The routers use either AC or DC power. Figure 299 on page 609 shows
the M5 and M10 router power supplies and where they are installed in the chassis.
Figure 299: M5 and M10 Router Redundant Power Supplies
M5 and M10 router rear
AC power supply DC power supply
g004150
Power supply A
Power supply B
When the power supplies are installed and operational, they automatically share the
electrical load. If a power supply stops functioning for any reason, the remaining power
supply instantly begins providing all the power the router needs for normal functioning
and can provide full power indefinitely.
NOTE: Mixing AC and DC power supplies is not supported. The two power
supplies must be either both AC or both DC.
When two power supplies are installed, at least one Routing Engine and one
FPC must also be installed for both power supplies to power on. In the
absence of this minimum load, only one power supply starts. (The router
powers on and operates correctly with one power supply, but without the
redundancy benefit of having a second power supply installed.)
609Copyright © 2012, Juniper Networks, Inc.
Chapter 30: Monitoring Redundant Power Supplies

Juniper M Series Specifications

General

Brand	Juniper
Model	M Series
Category	Network Router
Language	English