EX9253 Power System

AC Power Supply Description

Each AC power supply weighs approximately 3.4 lb (1.54 kg) and consists of a handle, an ejector lever, an AC appliance inlet, a fan, and an LED to monitor the status of the power supply. Figure 1 shows the power supply and Figure 2 shows the power supply components.

Figure 1: AC Power Supply

Figure 2: AC Power Supply Components

1 — Ejector lever	3 — Status LED
2 — AC power cord inlet	4 — Handle

Each power supply has its own fan and is cooled by its own internal cooling system. EX9253 switches support 800 W and 1600 W AC power supply. The AC power supply supports the low line (90 through 140 VAC) and the high line (180 through 264 VAC) AC power configurations. Each AC power supply has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. We recommend that you use a customer site circuit breaker rated for 15 A @ 100 VAC or 16 A @ 200 VAC circuit breaker minimum for each AC power supply, or as required by local code. Doing so enables you to operate the switch in any configuration without upgrading the power infrastructure.

AC Power Cord Specifications for an EX9253 Switch

A detachable AC power cord is supplied with the AC power supplies. The 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 1 gives the AC power cord specifications for the countries and regions listed in the table.

Figure 3 illustrates the plug on the power cord for some of the countries or regions listed in Table 1.

Figure 3: AC Plug Types

AC Power Supply Specifications for EX9253 Switches

Table 2 lists the AC power system electrical specifications.

Table 3 lists the AC power supply electrical specifications.

DC Power Supply Description

Each DC power supply weighs approximately 4.4 lb (1.99 kg) and consists of a handle, an ejector lever, a status LED, 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 40 A (–48 VDC) minimum, or as required by local code.

Figure 4 shows the power supply and Figure 5 shows the power supply components.

Figure 4: DC Power Supply

Figure 5: DC Power Supply Components

1 — Ejector lever	3 — DC power terminals
2 — Status LED	4 — Handle

Each power supply has its own fan and is cooled by its own internal cooling system. EX9253 switches support 1100 W DC power supply. Each DC power supply has terminals located on the power supply that require dedicated feeds. We recommend that you use a dedicated customer-site circuit breaker rated for 40 A (–48 VDC) minimum, or as required by local code. Doing so enables you to operate the switch in any configuration without upgrading the power infrastructure.

DC Power Supply Specifications for EX9253 Switches

Table 4 lists the DC power system electrical specifications.

Table 5 lists the DC power supply electrical specifications.

Power Requirements for EX9253 Components

Table 6 lists the power requirements for various hardware components when the switch is operating under typical and maximum voltage conditions.

Calculating System Thermal Output

After you have calculated the power consumption for your configuration, you can use that information to determine the system thermal output (BTUs per hour). Multiply the power consumption in watts by 3.41 to compute the system thermal output.