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®
3Com Switch 8800
Power Over Ethernet
Installation Guide
www.3Com.com
Part Number: 10015270 Rev. AA
Published: July 2006
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3Com Corporation Copyright © 2006, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written 350 Campus Drive permission from 3Com Corporation. Marlborough, MA 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time USA 01752-3064 without obligation on the part of 3Com Corpo
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CONTENTS 3 CONTENTS 1 INTRODUCTION Switch 8800 PoE Power Rack 5 Features 5 Architecture and Configurations 5 2 SYSTEM DESCRIPTION Overview 9 Power Supply Modules 9 PoE Power Rack 9 Power Supply Module Visual indicators 10 System Controller 10 Distribution Panel 12 3 SAFETY Safety Statements 13 Warning Statements and Safety Symbols 13 Precautions 13 4 INSTALLATION AND TESTING Introduction 15 Guidelines 15 EMI Considerations 15 Safety
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4 CONTENTS
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INTRODUCTION 1 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
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6 CHAPTER 1: INTRODUCTION Figure 1 The PoE Power Rack Figure 2 The PoE Power Rack (Rear View) Refer to Figure 3 for the front view of a fully equipped PoE power rack. It consists of: ■ System controller with 2 LEDs and 3 connectors ■ Distribution panel with DC output sockets and three AC input sockets ■ Power supply modules (3 modules are shown in Figure 3) The three AC input sockets correspond to the three power supply modules (numbered from left to right).
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Architecture and Configurations 7 Figure 3 The PoE Power Rack Configured with Three Power Supply Modules (Front VIew)
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8 CHAPTER 1: INTRODUCTION
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SYSTEM DESCRIPTION 2 Overview Figure 4 shows the schematic diagram of the PoE Power Rack power system, showing the interconnections and signal flow through the power supply modules and internal components. Figure 4 Schematic Diagram of the PoE Power Rack Power Supply DC power is supplied to the power bus by the power supply modules. Modules The PoE Power Supply Module is interchangeable between the Switch Rack and the Switch 8800 PoE Power Rack. NO other components are interchangeable.
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10 CHAPTER 2: SYSTEM DESCRIPTION Power Supply Module The front panel of the power supply module has three LEDs (Figure 5). Their Visual indicators descriptions, colors, and functions are shown in Table 2. Figure 5 Power Supply Module Front Panel Table 2 LED State Description Condition AC OK (green) DC OK (green) Fault (Red) All OK Lighted Lighted Off Thermal alarm Lighted Off Off (Ambient) Thermal alarm (fan fail) Lighted Off Lighted Blown AC fuse in unit Lighted Off Lighted Low or no AC >
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System Controller 11 ■ Monitor system operation status - An AC sensor card inside the PoE Power Rack samples the AC input voltage. The sampled signal is sent to the controller for processing. If the AC input voltage is lower than the pre-set alarm level, the controller reports an AC input under-voltage alarm. Likewise, if the input voltage is higher than the pre-set alarm level, the controller reports an AC input over-voltage alarm. The DC output voltage is also sampled and sent to the cont
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12 CHAPTER 2: SYSTEM DESCRIPTION Distribution Panel The distribution panel consists of DC output sockets and three AC input sockets. Refer to Figure 7. Figure 7 Distribution Panel The three EN60320 C20 AC input sockets on the front panel of the device are rated at 20A@250VAC. Each socket supplies power to one power supply module. There is an AC power ON/OFF switch beside each AC input socket for individual power switching. The DC distribution panel has Copper bus bars and two 4 AWG/570mm
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SAFETY 3 Safety Statements Please read and follow all safety instructions and warnings before servicing the PoE Power Rack. Refer to the individual module product manuals for additional safety statements specific to the modules. ■ The device must be in a restricted access area (dedicated equipment rooms, equipment closets, etc.) where the applicable requirements of the device are met. ■ The equipment must be in a controlled environment (an area where the humidity is maintained at levels that
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14 CHAPTER 3: SAFETY electrical equipment and who understand the hazards that can arise when working on this equipment. ■ The PoE Power Rack can be powered by multiple AC inputs, ensure that the appropriate circuit protection device for each AC input being serviced is disconnected before changing or servicing a Power Supply Module. If servicing the PoE Power Rack, all the AC power cords must be removed from the equipment. ■ High leakage currents may be possible on this type of equipment. Ma
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INSTALLATION AND TESTING 4 Introduction This section outlines the sequence for installing the PoE Power Rack, including plug-in modules. Test procedures for verifying the integrity of the installation are also included. Guidelines The device must be installed to allow sufficient front and rear access. All cables must be routed through insulated conduit openings. All service operations can be completed on the front of the power rack. EMI Considerations When running the DC output cables, ensu
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16 CHAPTER 4: INSTALLATION AND TESTING Install the PoE DIMM If you are installing the optional PoE DIMM module, use the following instructions. Module Technical Specifications The technical specifications of PoE DIMM (Dual In-line Memory Module) are listed in Table 5. Table 5 Technical specifications of PoE DIMM module Number of Model ports Type Disconnect Detection PD67024MUAC 24 Master AC Powered devices compliant with IEEE 802.3af or the legacy standard PD67024S 24 Slave AC/DC Acc
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Installation Sequence 17 3 The following items are included in the unit packaging: PoE Power Rack, power supply module, dummy faceplates and cables. Remove all this material and place aside. Mounting screws are NOT supplied with the PoE Power Rack. Mounting screws may be obtained from the equipment rack/cabinet supplier. 4 It is your option to remove power supply module and dummy faceplates or before installation. Removing them makes the next step easier. Refer to Figure 8. 5 Install the cha
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18 CHAPTER 4: INSTALLATION AND TESTING Install Power Supply Power Supply Modules are installed by sliding into the power rack, pushing until the Modules power supply module is fully inserted, and closing the handle on the power supply module. Refer to Figure 10. 1 Verify that the AC power switches on the AC distribution panel are in the "OFF" position . 2 Insert the power supply module into the PoE Power Rack and slide it toward the backplane until it contacts the backplane connectors. 3 Clo
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Installation Sequence 19 Connecting to AC utility/ AC power input is accessed from the front of the unit. AC power cord connection is AC grounding made using power cords with IEC 60320 C-19 connector plugs. The AC power plugs are labeled Input 1, Input 2, and Input 3, which correspond to the power supply modules numbered from left to right. Refer to Figure 12. To connect AC power: 1 Turn the AC branch circuit breakers to the "OFF" position. 2 Ensure that the AC input switches are in the "OFF
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20 CHAPTER 4: INSTALLATION AND TESTING
