MX240 AC Power Supply Description

Each AC power supply weighs approximately 5.0 lb (2.3 kg) and consists of one AC appliance inlet, one AC input switch, a fan, and LEDs to monitor the status of the power supply. Figure 1 shows the power supply.

Each inlet requires a dedicated AC power feed and a dedicated customer site circuit breaker. For existing power supplies, we recommend that you use a minimum 15 A (250 VAC) customer site circuit breaker, or as required by local code.

For high-capacity power supplies, each inlet requires a dedicated AC power feed and a dedicated 16.0 A @ 100 VAC or 16.0 A @ 200 VAC circuit breaker, or as required by local code.

Figure 1: AC Power Supply

Figure 2: High-Capacity AC Power Supply

Warning: The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth.

AC Power Supply Configurations

The MX240 router supports either the low-line (110 V) AC power configuration or the high-line (220 V) AC power configuration.

• In the low-line (110 V) AC power configuration, the MX240 router contains either two AC power supplies (nonredundant), located horizontally at the rear of the chassis in slots PEM0 and PEM1 (left to right); or four AC power supplies (redundant), located in slots PEM0 through PEM3 (left to right). The low-line configuration requires two power supplies, and the third and fourth power supplies provide redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply in a redundant configuration fails or is removed, the remaining power supplies assume the entire electrical load without interruption. Two power supplies provide the maximum configuration with full power for as long as the router is operational.
• In the high-line (220 V) AC power configuration, the MX240 router contains one or two AC power supplies, located horizontally at the rear of the chassis in slots PEM0 and PEM2 (left to right). The high-line configuration requires one power supply, with the second power supply providing redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply fails or is removed, the remaining power supply assumes the entire electrical load without interruption. One power supply can provide the maximum configuration with full power for as long as the router is operational.