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TX Matrix Power System Description


The TX Matrix router supports DC power only. The TX Matrix router has two load-sharing DC power supplies, located at the lower rear of the chassis in slots PEM0 and PEM1 (top to bottom). The power supplies connect to the midplane, which distributes the different output voltages produced by the power supplies to the TX Matrix router components, depending on their voltage requirements.

Each power supply has either an active circuit breaker or an active current limiter for each output voltage it provides. There are no passive fuses in the TX Matrix router that must be replaced.

Each power supply is cooled by its own internal cooling system.

The TX Matrix router supports the DC power supplies in Table 1.


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.

Table 1: Supported Power Supplies


Model Number

First Supported Junos OS Release

Two-input 160-A DC power supply (EOL PSN-2010-01-644)

See the TX Matrix Two-Input 160-A Power Supply Description.



Three-input 240-A DC power supply

See the TX Matrix Three-Input 240-A Power Supply Description.

Note: For TX Matrix, this power supply is supported only in 2-INPUT mode