Figure 126: M5 And M10 Router Power Supplies - Juniper M Series Monitoring And Troubleshooting Manual

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Table 67: T Series Routers Power Supply Characteristics (continued)

Characteristic

Documentation

M5/M10 Router Power Supplies

Power supplies in the router must be of the same type: either two AC or two DC power

supplies. You cannot mix power supply types.

Checklist for Monitoring Power Supplies on page 273

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.

the M5 and M10 router power supplies and where they are installed in the chassis.

Figure 126: M5 and M10 Router Power Supplies

M5 and M10 router rear

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.

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.)

Chapter 10: Monitoring Power Supplies

Figure 126 on page 277

AC power supply

DC power supply