3Com 8800 manual Introduction

1

INTRODUCTION

Switch 8800 PoE	The 3Com Switch 8800 PoE power rack is a modular, stand-alone Power over
Power Rack	Ethernet (PoE) power source. The PoE Power Rack provides a total of 4500 Watts of
	DC power with 2+1 power redundancy for PoE powered devices connected to the
	Switch 8800 chassis.

Features	The PoE Power Rack has the following features:
	■ Compatible with a wide range of input voltages from 90 V to 264 V and uses 20
	A/250 VAC EN60320 C20 appliance coupler connectors and connector plugs.
	■ Power factor is above 0.99
	■ Efficiency is over 88%
	■ Maximum device output is (N + 1) 90A @ 54V
	■ Power supply modules are hot-swappable for uninterrupted operation
	■ The PoE Power Rack power status may be monitored by an RS232 or RS485
	interface
	■ Advanced EMC (Electro Magnetic Compatibility) design
	■ High safety and reliability

Architecture and	The PoE Power Rack architecture integrates DC power supply modules (3 maximum),
Configurations	a system controller, and the distribution module, in a four rack-unit-high (4U) chassis.
	The system controller provides local monitoring and control of the device. The general
	configuration is shown in Table 1.
	Table 1 The PoE Power Rack Configuration

Description	Standard Configuration
4U high chassis	D x W x H- 320.5 x 482.6 x 177mm (12.62 x 19.00 x 6.97 in)
System controller	One
SWITCH 8800 PoE	One installed (3 maximum for power redundancy)
Power Supply Module
AC distribution	■ Three independent AC power input sockets with three AC Power
components	switches
	■ 3-phase AC voltage sensor

The standard PoE Power Rack is configured with one power supply module. The power rack may be configured with up to 3 power supplies based on the power and power redundancy requirements. Refer to Figure 1 for overall dimensions. Refer to Figure 2 for the rear view of the PoE power rack.