Cisco Systems 1300 manual Load-Dump Protection for Transportation Vehicles

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A P P E N D I X H

Load-Dump Protection for Transportation

Vehicles

This appendix describes load-dump protection that is required for autonomous access point/bridge (model: AIR-BR1310G) operation in some transportation vehicles.

Load-Dump Protection

The autonomous access point/bridge can be installed in vehicles such as automobiles, trucks, and buses. Electronic equipment in vehicle environments can be subjected to high-energy voltage transients where the vehicle battery is accidentally disconnected from the alternator charging circuit. In the Society of Automotive Engineers (SAE) standards SAE J1455 and SAE J1211, this voltage transient is referred to as a load-dump transient, where the loading of the battery is dumped or removed from the alternator charging circuits. The access point/bridge does not contain built-in load-dump protection.

Note The power injector LR2T must be used in vehicles providing DC power to the power injector.

Some vehicles contain centralized electronics that are designed to suppress the load-dump transient and prevent equipment damage. To protect the bridge in vehicles without built-in load-dump suppression, you must install an external load-dump protection device, such as the IFM-efector EC2015 for nominal 12-VDC operation or the EC2016 for nominal 24-VDC operation. For additional information refer to the following URLs:

http://www.ifmefector.com/ifmus/web/dsfs!EC2015.html

http://www.ifmefector.com/ifmus/web/dsfs!EC2016.html

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

Cisco Aironet 1300 Series Wireless Outdoor Access Point/Bridge Hardware Installation Guide

	OL-5048-06	H-1

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Contents Corporate Headquarters Page Iii N T E N T SWindow Mounting Ssid Japanese Translation B-6 Vii Load-Dump Protection H-1Viii Audience PrefacePurpose OrganizationConventions Preface Conventions Obtaining Documentation Related PublicationsCisco.com XiiCisco Product Security Overview Documentation FeedbackProduct Documentation DVD Ordering Documentation XiiiProduct Alerts and Field Notices Reporting Security Problems in Cisco ProductsXiv Cisco Support Website Obtaining Technical AssistanceXvi Locating the Product Serial NumberXvii Submitting a Service RequestObtaining Additional Publications and Information Definitions of Service Request SeverityXviii Xix OL-5048-06 Overview Autonomous Access Point/BridgeProduct Terminology Lightweight Access Point Guidelines for Using a Lightweight Access Point/BridgeKey Features 1shows the two outdoor access point/bridge configurations PowerExternal Antenna Integrated AntennaEthernet Ports ConnectorsEnclosure LEDs Operating Roles for the Autonomous Access Point/Bridge Repeater Unit that Extends Wireless Range Network Examples with Autonomous Access Point/BridgesAccess Points as Root Units on a Wired LAN Root Access Point on a Wired LANBridge Network with Wireless Clients Central Unit in an All-Wireless NetworkWorkgroup Bridge Network Point-to-Point Bridge ConfigurationNetwork Examples with Lightweight Access Points OL-5048-06 Installation Overview All Installations Safety WarningsOutdoor and DC Power Source Installations Safety InformationDC Power Source Installations FCC Safety Compliance StatementInstallation Overview Safety Information Typical Outdoor Installation Components Installation GuidelinesPackage Contents Unpacking the Access Point/BridgeSite Surveys Before Beginning the Installation Access Point/Bridge Layout Installation Summary Installation Overview Installation Summary Mounting Overview Mounting the Access Point/Bridge, Mounting Hardware, LEDs,Mounting Hardware Mounting the Access Point/BridgeMulti-Function Mount Window MountingAccess Point Bracket LEDs Install LED Status Rssi Level dBm Ethernet LED Status LED Radio LED OL-5048-06 Troubleshooting Autonomous Access Points and Bridges Checking the LEDs on an Autonomous Access Point/Bridge Ethernet Status Radio Install Meaning Blinking Codes First Second Power Injector Checking Basic Configuration Settings Checking PowerDefault IP Address Behavior Default Ssid and Radio BehaviorSsid Enabling the Radio InterfaceAntenna Alignment Security SettingsRunning the Carrier Busy Test Running the Ping or Link Test Using the Web-Browser Interface Using the CLI on an Autonomous Access Point/Bridge Reloading the Access Point/Bridge ImageWeb-Browser Interface Browser Http Interface Obtaining the Autonomous Access Point/Bridge Image File Console Serial Port Connector Connecting to the Console Serial PortHttp//tftpd32.jounin.net Obtaining the Tftp Server SoftwareOL-5048-06 Troubleshooting Lightweight Access Points Checking the LEDs on Lightweight Access Points LED Indications Troubleshooting Lightweight Access Points Power Injector Using Dhcp Option Console serial port connector RJ-45 connector Clearing Manually Entered Controller Information Configuring Controller InformationManually Resetting the Access Point to Defaults Returning the Access Point to Autonomous ModeObtaining the Autonomous Access Point Image File OL-5048-06 Translated Safety Warnings OL-5048-06 Declarations of Conformity and Regulatory Information For Home or Office USE Canadian Compliance Statement Vcci Statement for Japan Industry CanadaOL-5048-06 EMC Japanese Translation Declaration of Conformity for RF ExposureEnglish Translation All Access Points and BridgesEnglish Translation Access Point Models Operation of Cisco Aironet Access Points in BrazilDeclaration of Conformity Statements Page OL-5048-06 Category Access Point Power Injector and Power Module Access Point SpecificationsOfdm Category Access Point Power Injector and Power Module Category Access Point Power Injector and Power Module Channels and Maximum Power Levels OL-5048-06 Console Serial Cable Pinouts Overview, page E-2 Signals and Pinouts, page E-2Overview Signals and PinoutsPriming Lightweight Access Points Prior to Deployment OL-5048-06 Page OL-5048-06 Access Points Access Point Vendor Class Identifier VCI Quotation marks must be included Type + Length + Value Load-Dump Protection Load-Dump Protection for Transportation VehiclesAppendix H Load-Dump Protection for Transportation Vehicles GL-1 NumericGL-2 Signal continuously over a wide frequency bandGL-3 GL-4 Single data message packet sent to multiple addressesGL-5 Power level of radio transmissionGL-6 IN-1 D EIN-2 Site survey Size C-1 SSID, troubleshooting

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