MX240 DC Power Supply Description
Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated customer site circuit breaker. We recommend that you use a dedicated customer site circuit breaker rated for 40 A (–48 VDC) minimum, or as required by local code.
Figure 1: DC Power Supply
DC Power Supply Configurations
In the DC power configuration, the router contains either one or two DC power supplies (see Figure 1) located at the rear of the chassis in slots PEM0 and PEM2 (left to right). You can upgrade your DC power system from one to two power supplies. A single DC power supply provides power to all components. One DC power supply is required. 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.
