Specifications

Page 3 of 137 Manual Documentation Number: <DocNumber>
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Port Powered Converters ................................................................................. 77
Repeaters ...................................................................................................... 77
Optically Isolated RS-422/485 Devices .............................................................. 79
Sources of Additional Information ............................................................. 81
Global Engineering .......................................................................................... 81
List of EIA/TIA Standards ................................................................................ 82
Integrated Circuit Manufacturers ....................................................................... 82
Other sources of information ............................................................................ 83
EIA Specification Summary ....................................................................... 85
EIA-422 Specifications .................................................................................... 85
EIA-485 Specifications .................................................................................... 86
EIA-232 Specifications .................................................................................... 86
EIA-423 Specifications .................................................................................... 87
Comparison of RS-232, RS-423, RS-422 and RS-485 Specifications ....................... 87
EIA Standard RS-423 Data Transmission ................................................... 89
Testing and Troubleshooting RS-422/485 Systems ................................... 91
Selecting RS-485 Devices ................................................................................ 91
Troubleshooting Checklist ................................................................................ 92
Troubleshooting Flowchart ............................................................................... 93
RTS Control Timing Diagrams ........................................................................... 95
Send Data Control Timing Diagrams .................................................................. 96
Bit-Wise Enable Timing Diagrams ...................................................................... 97
Glossary of Terms ..................................................................................... 99
Index ...................................................................................................... 130