MX204 AC Power System

The MX204 is powered using either AC or DC power. It supports two power supply modules (PSMs) located at the rear of the chassis in slots 0 and 1. Figure 1 and Figure 2 show the MX204 PSMs. The AC or DC power supply modules directly plug on to main board and are placed on the right side of the rear chassis. Each power supply has a handle, an ejector lever, and status LEDs. The power supply modules connect to the PSM board, which distributes the different output voltages produced by the power supply modules to the router components, depending on their voltage requirements. When both the power supply modules are present, they share power almost equally within a fully populated system. If the first power supply in a redundant configuration fails or is removed, the second power supply assumes the entire electrical load without interruption. A single power supply provides the maximum configuration with full power for as long as the router is operational. A second power supply can be installed for redundancy. The chassis is designed to support 1+1 feed redundancy.

Redundant power supply is hot-removable and hot-insertable. If you remove a power supply from a router that uses only one power supply, then the router shuts down.

The power supply modules are cooled by its own internal cooling system. A fan present in the power supply module monitors and maintains the temperature inside.

• AC Power Supply Description
• DC Power Supply Description

AC Power Supply Description

Each AC power supply weighs approximately 2.2 lb (1 kg) and consists of a handle, an ejector lever, an AC appliance inlet, a fan, and status LEDs to monitor the status of the power supply. Figure 1 shows the AC power supply.

Each inlet requires a dedicated AC power feed and a dedicated customer-site circuit breaker. We recommend that you use a minimum 20 A (110 VAC) or 16 A (220 VAC) customer-site circuit breaker, or as required by local code.

Warning:

The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for 10–32 screws) 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.

Figure 1: AC Power Supply

DC Power Supply Description

Each DC power supply weighs approximately 2.2 lb (1 kg) and consists of a handle, an ejection lever, status LEDs, and a terminal block that provides 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 25 A (–48 VDC) minimum, or as required by local code.

Figure 2 shows the DC power supply.

Figure 2: DC Power Supply

• AC Power Supply Module LEDs
• DC Power Supply Module LEDs

AC Power Supply Module LEDs

Figure 3 shows the AC power supply module components along with the status LEDs.

Figure 3: AC Power Supply Module LEDs and Components

1 — Input status LED	4 — Ejector lever
2 — Output status LED	5 — AC power cord retainer port
3 — Fault LED

Figure 4 shows the AC power supply module components with the AC power cord retainer along with the status LEDs.

Figure 4: AC Power Supply Module LEDs and Components––with the AC Power Cord Retainer

1 — Input status LED	4 — AC power cord retainer installed
2 — Output status LED	5 — Ejector lever
3 — Fault LED

Table 1 describes the LEDs on the AC power supply modules.

Table 1: AC Power Supply Module LEDs

Label	Color	State	Description
AC OK	Unlit	Off	The power supply is disconnected from power source, or the power supply is not receiving power.
	Green	On steadily	Power supply is receiving power.
DC OK	Unlit	Off	Power supply output is off.
	Green	On steadily	The power supply is sending out power correctly.
! (Fault)	Amber	On steadily	An error has been detected in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

Note:

If the AC OK LED and the DC OK LED are unlit, either the AC power cord is not installed properly or the power supply fuse has failed. If the AC OK LED is lit and the DC OK LED is unlit, the AC power supply is installed properly, but the power supply has an internal failure.

DC Power Supply Module LEDs

Figure 5 shows the DC power supply modules status LEDs.

Figure 5: DC Power Suppy Module LEDs

1 — Input LED	3 — Fault LED
2 — Output LED

CAUTION:

On the DC power supply, the V+ terminals are shunted internally together, as are the V– terminals. The same polarity terminal can be wired together from the same source to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources.

Table 2 describes the LEDs on the DC power supply modules.

Table 2: DC Power Supply Module LEDs

Label	Color	State	Description
IN (Input)	Unlit	Off	The power supply is disconnected from power source, or the power supply is not receiving power.
	Green	On steadily	Power supply is receiving power.
OUT (Output)	Unlit	Off	Power supply output is off.
	Green	On steadily	The power supply is sending out power correctly.
! (Fault)	Amber	On steadily	An error has been detected in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

Table 3 lists the AC power system electrical specifications.

Table 4 lists the AC power supply electrical specifications.

We recommend that you use a dedicated customer-site circuit breaker rated for 20 A (110 VAC) minimum or 16 A (220 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.

You can order detachable AC power cords based on your geographical location. The cord coupler is type C13 as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source outlet that is standard for your geographical location.

Table 5 gives the AC power cord specifications for the countries and regions listed in the table.

Figure 6 illustrates the plug on the power cord for some of the countries or regions listed in Table 5.

Figure 6: AC Plug Types