AC Power Supplies in an EX6200 Switch

EX6200 switches can use either AC or DC power supplies. This topic describes the AC power supplies used in EX6200 switches. The switches support both 2500 W AC power supplies and 5000 W AC power supplies.

Each power supply connects to the backplane in an EX6210 switch. The backplane distributes the output power produced by the power supplies to different switch components. Each power supply provides power to all the components in the switch.

Caution: Mixing different types of power supplies (AC and DC or AC power supplies of different wattage) in the same chassis is not supported. Mixing low-voltage input line and high-voltage input line power feeds in the same chassis is not supported.

This topic includes:

Characteristics of an AC Power Supply

Figure 1 shows the 2500 W AC power supply. Figure 2 shows the 5000 W AC power supply.

Figure 1: 2500 W AC Power Supply

Figure 2: 5000 W AC Power Supply

Table 1 lists the details of the 2500 W AC and 5000 W AC power supplies used in EX6200 switches.

Note: Grounding is recommended for AC systems. An AC-powered switch gets additional grounding when you plug the power supply in the switch into a grounded AC power outlet using the power cord.

Caution: The switch is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal 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 ground.

Note: All switch configurations of EX6200 switches are shipped with one power supply. Cover panels are installed over the remaining three power supply slots. Additional power supplies can be added to the different switch configurations as necessary. For details about different switch configurations, see EX6210 Switch Configurations .

AC Power Supply Power Cord Retainer

This section describes the power cord retainers for the 2500 W and 5000 W AC power supplies:

2500 W AC power supply—Each 2500 W AC power supply comes with a power cord retainer that holds the power cord in place. See Figure 3. The power cord retainer has a clip and an adjustment nut. The L-shaped ends of the clip hook into the bracket holes on the top and bottom of the AC appliance inlet on the faceplate. The adjustment nut holds the power cord in the correct position. For instructions for installing the power cord retainer, see Connecting AC Power to an EX6200 Switch.

Figure 3: Power Cord Retainer for a 2500 W AC Power Supply

5000 W AC power supply—Each 5000 W AC power supply comes with two power cord retainers that hold the power cords in place. Each power cord retainer has a clip and an adjustment nut. The L-shaped ends of the clip hook into the bracket holes on the sides of the AC appliance inlet on the faceplate. The adjustment nut holds the power cord in the correct position. For instructions for installing the power cord retainer, see Connecting AC Power to an EX6200 Switch.

Figure 4: Power Cord Retainers for a 5000 W AC Power Supply

Power Supply Cover Panels

All switch configurations of EX6200 switches ship with one power supply installed in the switch. Power supply cover panels are installed in the remaining three power supply slots. Different power supply cover panels are used for different power supplies. Table 2 lists the different power supplies and the cover panel used for each kind. See Figure 5.

Figure 5: Power Supply Cover Panels Used in EX6200 Switches

Caution: You must use the correct power supply cover panel to ensure power airflow of the power supplies installed in the switch.

Note: If you are upgrading your EX6200 switch from 2500 W AC power supplies to the 5000 W AC power supplies, you must order the 5000 W AC power supply cover panels separately.

Power Supply Airflow

Each power supply has its own fan and is cooled by its own internal cooling system. The airflow is from the front of the power supply to the back. Hot air exhausts from the rear of the chassis.

N+1 Redundancy Configuration of AC Power Supplies

We recommend an N+1 redundancy configuration for normal operation of EX6200 switches. In an N+1 redundancy configuration, if one power supply fails or is removed, the remaining power supplies (N) continue to supply power for the switch without interruption.

You can determine the minimum number of power supplies needed (N) for a switch and then install an additional power supply to meet the required N+1 redundancy configuration.

For details about different switch configurations, see EX6210 Switch Configurations .

Table 3 lists the N+1 power requirements of EX6210 switch configurations that use 2500 W AC and 5000 W AC power supplies.

Note: The calculations for the 5000 W AC power supply are based on the assumption that both power feeds are connected and active .

N+N Redundancy Configuration of AC Power Supplies

You can optionally configure your switch for N+N redundancy, in which N power supplies can be removed or fail and the remaining N power supplies continue to supply power for the switch without interruption.

You can configure the power management software to manage switch power for N+N redundancy. When you configure power management for N+N redundancy, half of the total power available (N) is held as reserve power while the other half (N) is available for immediate consumption. If the switch configuration changes and requires additional power, additional power is drawn from the reserve power, the switch no longer has N+N power supply redundancy. This condition raises a minor alarm. If the condition is not corrected within 5 minutes, a major alarm is issued.

For more information on how power management allocates power to chassis components when power is insufficient, see Understanding Power Management on EX Series Switches.

You can determine the minimum number of power supplies needed (N) for the switch and then install additional power supplies to meet the N+N redundancy configuration.

For details about different switch configurations, see EX6210 Switch Configurations.

Table 4 lists the N+N power requirements of EX6210 switch configurations that use 2500 W AC and 5000 W AC power supplies.

Note: The calculations for the 5000 W AC power supply are based on the assumption that both power feeds are connected and active .