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 and on and operates correctly with one power supply, but without
the redundancy benefit of having a second power supply installed.)
Figure 129: M20 Router Power Supplies
M20 router rear
AC power supply
DC power supply
g004151
Power supply A Power supply B
Related
Documentation
Checklist for Monitoring Power Supplies on page 273•
M40 Router Power Supplies
The M40 router can use either AC or DC power. Two load-sharing power supplies install
into the bays located at the bottom rear of the chassis. As viewed from the rear of the
chassis, the supply on the left is referred to as supply A and the supply on the right as
supply B. Figure 130 on page 281 shows the M40 router power supplies and where they
are installed in the chassis.
The power supplies are fully redundant. When both power supplies are operational, they
automatically share the electrical load. If one 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.
Copyright © 2012, Juniper Networks, Inc.280
M Series and T Series Routers Monitoring and Troubleshooting Guide
To Next Page
Loading...
Need help?
General
