Table of Contents
Chapter 1: Introduction
........................................................................................................................................ 5
Multi-Protocol Operation
.................................................................................................................................. 5
RS485 and RS422 Balanced Mode Operation
................................................................................................ 5
COM Port Compatibility
.................................................................................................................................... 5
Communication Modes
.................................................................................................................................... 5
RTS and Auto Transceiver Control
................................................................................................................. 6
CE Mark
.............................................................................................................................................................. 6
Specification
...................................................................................................................................................... 7
Figure 1-1:
Block Diagram.............................................................................................................................. 8
Chapter 2: Installation
.......................................................................................................................................... 9
Chapter 3: Option Selection
.............................................................................................................................. 11
422/485
............................................................................................................................................................. 11
Terminations and Bias
................................................................................................................................... 11
CLK X1 and CLK X4
........................................................................................................................................ 11
Data Cable Wiring
........................................................................................................................................... 11
Interrupts
......................................................................................................................................................... 12
In Windows NT 4 and Lower Without PCIFind.EXE
..................................................................................... 12
Figure 3-1:
Option Selection Map................................................................................................................. 13
Chapter 4: Address Selection
........................................................................................................................... 14
Chapter 5: Programming
................................................................................................................................... 15
Sample Programs
............................................................................................................................................ 15
Windows Programming
.................................................................................................................................. 15
Initialization
..................................................................................................................................................... 15
Table 5-1:
Baud Rate Divisors...................................................................................................................... 16
Reception
......................................................................................................................................................... 17
Transmission
................................................................................................................................................... 17
Chapter 6: Connector Pin Assignments
.......................................................................................................... 19
Table 6-1:
Connector Pin Assignments ........................................................................................................ 19
Appendix A: Application Considerations
......................................................................................................... 20
Balanced Differential Signals
........................................................................................................................ 20
Table A-1:
RS422 Specification Summary ................................................................................................... 20
RS485 Data Transmission
.............................................................................................................................. 21
RS485 Two-Wire Multidrop Network
............................................................................................................. 21
Figure A-1:
Typical RS485 Two-Wire Multidrop Network ............................................................................ 21
RS485 Four-Wire Multidrop Network
............................................................................................................ 22
