AC7A/B User’s Guide
3
WELCOME
Additional Technical Information ........................................................ 27
General Notes ................................................................................................................................ 27
Two-Wire RS-485 Mode ............................................................................................................ 28
Using Multiple AC7A/B Units on One Link .......................................................................... 30
Background ........................................................................................................................... 30
Description ............................................................................................................................. 30
Setup ......................................................................................................................................... 31
Biasing ...................................................................................................................................... 31
Termination ............................................................................................................................. 31
Wiring and Related Jumpers ............................................................................................. 31
Additional Jumpers .............................................................................................................. 31
Commonly Used RS-232 Signals ............................................................................................. 32
Using Protective Ground on AC7A/B ............................................................................. 33
Biasing and Terminating RS-422/485 ................................................................................... 33
Communication Jumpers ................................................................................................... 34
Troubleshooting ........................................................................................................................... 35
Glossary of Terms ......................................................................................................................... 36
RS-422/485 Cable Specifications ........................................................................................... 37
Appendix A: AC7A/B DB9 (J2) Connection Pinout ................................ 38
Product Support ..................................................................................... 39
