Omega Engineering OMG-CONV-485-ISO manual Contents

Contents
INTRODUCTION	1
OVERVIEW	1
WHAT ’S INCLUDED	1
FACTORY DEFAULT SETTINGS	1
CARD SETUP	2
RS-485 ENABLE MODES	2
LINE TERMINATION AND RECEIVER ECHO OFF/ON	4
OPERATING SYSTEM INSTALLATION (FOR WINDOWS USERS)	6
RS-422/RS-485 Four Wire Master/RS-485 Two Wire Auto Mode
Installation	6
RS-485 Two-Wire and RS-485 Four-Wire Slave Installation	7
Other Operating Systems	8
SYSTEM INSTALLATION	9
TECHNICAL DESCRIPTION	10
CONNECTOR PIN ASSIGNMENTS	10
RS-232 Signals (DB-25 Female)	10
RS-422/485 Pin Assignments (6 Position Screw Terminal)	10
SPECIFICATIONS	11
ENVIRONMENTAL SPECIFICATIONS	11
MANUFACTURING	11
MEAN TIME BETWEEN FAILURES (MTBF)	11
PHYSICAL DIMENSIONS	11
APPENDIX A - TROUBLESHOOTING	12
APPENDIX B - HOW TO GET ASSISTANCE	13
APPENDIX C - ELECTRICAL INTERFACE	14
RS-232	14
RS-422	14
RS-485	15
APPENDIX D - GROUND LOOP PHENOMENON	16
WHAT IS GROUND LOOP ?	16
CABLING RECOMMENDATIONS	16
APPENDIX E - ASYNCHRONOUS COMMUNICATIONS	17