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Windows NT and Windows 95/98 ......................................................................................4-1
PComm Installation.....................................................................................................................4-1
PComm Programming Library.....................................................................................................4-2
Utilities......................................................................................................................................4-2
DOS ..................................................................................................................................4-5
Installing API-232 .....................................................................................................................4-5
DOS API-232 Library................................................................................................................4-5
Utilities......................................................................................................................................4-5
Windows 3.x......................................................................................................................4-8
Windows COMM API Library (Win16).......................................................................................4-8
Utility........................................................................................................................................4-8
Existing Applications.................................................................................................................4-9
RS-485 Programming......................................................................................................4-10
Automatic Data Direction Control Mode (Recommended)........................................................4-10
By RTS Mode (For back-compatibility)....................................................................................4-10
Connection Cable and Cable Wiring.................................. 5-1
RS-422 Cable Wiring.........................................................................................................5-1
RS-485 Cable Wiring.........................................................................................................5-3
Impedance Matching and Termination Resistors................................................................5-4
DB-37 Connector Pin Outs.................................................................................................5-5
Troubleshooting............................................................... 6-1
General Troubleshooting....................................................................................................6-1
Windows NT......................................................................................................................6-4
Windows 95/98..................................................................................................................6-5
DOS ..................................................................................................................................6-6
Technical Reference ........................................................A-1
Specifications ................................................................................................................... A-1
UART TI550C................................................................................................................... A-2
PC I/O Port Address Map.................................................................................................. A-3