Dc Power Supply Configurations; Figure 34: Dc Power Supply; Figure 35: High-Capacity Dc Power Supply - Juniper MX240 Hardware Manual

DC Power Supply Configurations

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site circuit breaker. For normal capacity power supplies, we recommend a dedicated
circuit breaker rated for 40 A (–48 VDC) minimum, or as required by local code.
For high capacity power supplies, we recommend that you provision 60 A or 70 A per
feed, depending on the selected DIP switch setting.
Figure 34 on page 93 shows the normal capacity DC power supply.
Figure 35 on page 93 shows the high-capacity DC power supply.

Figure 34: DC Power Supply

Figure 35: High-Capacity DC Power Supply

In the DC power configuration, the router contains either one or two DC power supplies
located at the rear of the chassis in slots
your DC power system from one to two power supplies. A single DC power supply provides
power to all components. A second DC power supply provides redundancy. If a DC power
supply in a redundant configuration fails, the redundant power supply takes over without
interruption.
High-capacity DC power supplies have a DIP switch that selects the power output.
Chapter 7: Power System Components and Descriptions
PEM0 and PEM2 (left to right). You can upgrade
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