MX240 AC Power System

The MX240 router uses either AC or DC power supplies. 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.

The MX240 router is configurable with two, three, or four AC power supplies or one or two DC power supplies. The power supplies connect to the midplane, which distributes the different output voltages produced by the power supplies to the router components, depending on their voltage requirements. Each power supply is cooled by its own internal cooling system.

Redundant power supplies are hot-removable and hot-insertable. When you remove a power supply from a router that uses a nonredundant power supply configuration, the router might shut down depending on your configuration.

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. For existing power supplies, each inlet requires a dedicated AC power feed and a dedicated 15 A (250 VAC) circuit breaker.

Figure 1: AC Power Supply

For high-capacity power supplies, each inlet requires a dedicated AC power feed and a dedicated 16.0 A @ 100 VAC or 11.0 A @ 200 VAC circuit breaker, or as required by local code.

Figure 2shows the high-capacity power supply.

Figure 2: High-Capacity AC Power Supply

Each AC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 1). The power supply status is also reflected in two LEDs on the craft interface (see MX240 Component LEDs on the Craft Interface).In addition, a power supply failure triggers the red alarm LED on the craft interface.

Table 2 lists the AC power supply electrical specifications; Table 3 lists the AC power system specifications.

We recommend that you use a dedicated customer site circuit breaker rated for 15 A (250 VAC) minimum for each AC power feed, or as required by local code. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure.

Each AC power supply has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the router. An AC power cord connects each power supply to the power distribution panel.

You can order detachable AC power cords, each approximately 8 ft (2.5 m) long that supply AC power to the router. The C19 appliance coupler end of the cord inserts into the AC appliance inlet coupler, type C20 (right angle) as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source receptacle that is standard for your geographical location.

Table 4 provides specifications and Figure 3 depicts the plug on the AC power cord provided for each country or region.

Figure 3: AC Plug Types

Warning:

Translation from Japanese: The attached power cable is only for this product. Do not use the cable for another product.

This topic lists the outstanding issues with the documentation:

• In the low-line (110 V) AC power configuration (nonredundant), two AC power supplies should be located horizontally at the rear of the chassis in slots PEM0 and PEM1 (left to right).