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