24 Installation Guide (AA-RTDWE-TE, November 2005)

Table Of Contents

Edge Switch 2/24 installation guide 19

Rear panel

Figure 2 shows the rear of the Edge Switch and identifies its components.

Figure 2 Edge Switch (rear view)

The rear panel of the Edge Switch includes the following:

• Power supplies

The Edge Switch contains two power supply assemblies . The redundant, load-sharing power

supply assemblies step down and rectify facility input power to provide 3.3 volts direct current

(VDC), 5 VDC, and 12 VDC to the CTP card. The power supplies also provide input filtering,

overvoltage protection, and overcurrent protection.

Either power supply can be replaced while the Edge Switch is operational. Each power supply

has a separate connection to the CTP card to allow for independent AC power sources. The

power supplies are input rated at 90 to 264 volts alternating current (VAC). Power supply

requirements are listed in ”Technical specifications” on page 115.)

• Cooling fans

Three cooling fans integrated in each power supply assembly (a total of six fans) provide cooling

for the power supplies and CTP card, as well as redundancy for continued operation if a single

fan fails.

• Maintenance port

The rear panel provides a 9-pin RS-232 maintenance port that provides a connection for a local

terminal or dial-in connection for a remote terminal. Although the port is typically used by

authorized maintenance personnel, operations personnel can use the port to configure Edge

Switch network addresses.

1 Power supplies with internal

cooling fans (2)

2 Maintenance port

SHR 2596A