Black Box RS-232/422/485, RS422/485 manual Calling Black Box, Shipping and Packaging

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APPENDIX A: Troubleshooting

A.2 Calling Black Box

If you determine that your USB Hub is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box at 724-746-5500.

Before you do, make a record of the history of the problem. We will be able to provide more efficient and accurate assistance if you have a complete description, including:

the nature and duration of the problem.

when the problem occurs.

the components involved in the problem.

any particular application that, when used, appears to create the problem or make it worse.

A.3 Shipping and Packaging

If you need to transport or ship your USB Hub:

Package it carefully. We recommend that you use the original container.

If you are shipping the USB Hub for repair, make sure you include everything that came in the original package. Before you ship, contact Black Box to get a Return Authorization (RA) number.

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Contents July IC1020A IC1021A IC1022A Federal Communications Commission DUAL- and QUAD-PORT USB Hubs EMC Directive StatementNOM Statement DUAL- and QUAD-PORT USB Hubs Trademarks Contents Specifications Introduction OverviewWhat’s Included Technical DescriptionConnector Pin Assignments Signal Name Pin # ModeSignal Name Installation Operating System InstallationSystem Installation Installation Configuration Original ConfigurationElectrical Interface Selection Jumpers E5, E6, E7, and E8Switch SW4 Settings Jumper Port RS-232 RS-422/485Switch Switch SW3 SettingsDescription RS-485 RS-422 Switch Port Description RS-485 Switch SW2 and SW4 SettingsSwitch SW1 and SW3 Settings Port Description RS-485 QUAD-PORTUSB HUB-RS-232/422/485 IC1022AJumpers E1, E2, E3, E4, E5, E6, E7, and E8 Switch Setting Port Description RS-485 RS-422Setting Appendix A. Troubleshooting Troubleshooting TipsCalling Black Box Shipping and PackagingAppendix B. Electrical Interfaces RS-232RS-422 RS-485 Figure C-1. Bit diagram for asynchronous communication Appendix C Asynchronous CommunicationAppendix C Asynchronous Communication Copyright 2002. Black Box Corporation. All rights reserved