NOTE: Mixing AC and DC power supplies is not supported and prevents the
router from booting. If two power supplies are installed, they must be either
both AC or both DC.
•
A circuit breaker box must be installed on a DC-powered router, while a
circuit breaker is incorporated into each AC power supply. Converting the
router from AC to DC power or vice versa involves removing or installing
the circuit breaker box. Only authorized service personnel should perform
the conversion: this manual does not include instructions.
•
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.)
Figure 306: T1600 Router Redundant Power Supplies
T1600
g006661
PEM 0
PEM 1
3-input 240-A
power supplies
Related
Documentation
Checklist for Monitoring Redundant Power Supplies on page 607•
TX Matrix Redundant Power Supplies
The TX Matrix router supports DC power only. The TX Matrix router has two load-sharing
DC power supplies, two-input 160-A DC and three-input 240-A, located at the lower rear
of the chassis in slots PEM0 and PEM1 (top to bottom). Figure 307 on page 618 shows
the TX Matrix router power supplies and where they are installed in the chassis.
These two power supplies share the load evenly. If one power supply fails, the other
power supply can provide full power to the TX Matrix router indefinitely.
NOTE: Mixing a two-input 160-A power supply and a three-input 240-A power
supply in the same chassis is not supported during normal operations.
617Copyright © 2012, Juniper Networks, Inc.
Chapter 30: Monitoring Redundant Power Supplies
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