B&B Electronics 3PCIU4 - Manual (Page 6)

iv Table of Contents Manual Documentation Number 3PCIoUx-1008
RS-422/485 S IGNAL D ESIGNATIONS AND DB-9 P INOUT .......................................... 59
RS-422/485 Signal Designations ......................................................................... 60
RS-422/485 D IFFERENTIAL S IGNALS ........................................................................ 60
RS-422 O PERATION .................................................................................................. 61
RS-422 Limitations ............................................................................................... 61
RS-485 O PERATION .................................................................................................. 61
Send Data Control ............................................................................................... 62
RS-485 T ERMINATION R ESISTORS ............................................................................ 63
RS-485 N ETWORK B IASING ...................................................................................... 63
2-W IRE RS-485 C ONNECTIONS ................................................................................ 65
2-Wire RS-485 Mode: .......................................................................................... 65
4-W IRE RS-422 AND RS-485 C ONNECTIONS ............................................................ 65
RS-422 Point to Point Connection ....................................................................... 65
RS-422 Point to Multipoints Connection ............................................................. 66
4-Wire RS-485 Connection .................................................................................. 66
CHAPTER 9: TROUBLESHOOTING MIPORT CARDS .................................... 68
S TARTING U P ............................................................................................................ 68
C HECKING C ONNECTIONS ......................................................................................... 68
RS-232/422/485 Operation .................................................................................. 68
RS-232 Operation ................................................................................................ 68
RS-422/485 Operation ......................................................................................... 69
C HECKING THE MI PORT C ARD ................................................................................. 69
Support ................................................................................................................. 71
APPENDIX A: DIP SWITCH/MODE SETTINGS .................................................. 1
S ETTING THE DIP S WITCHES ON RS-232/422/485 P ORTS ........................................... 1
DIP Switch 1 (RS-232/422/485 ports) .................................................................... 1
DIP Switch 2 (RS-232/422/485 ports) .................................................................... 1
DIP Switch 3 (RS-232/422/485 ports) .................................................................... 2
S ETTING THE DIP S WITCHES ON RS-422/485 O NLY P ORTS ........................................ 2
APPENDIX B: CONNECTOR PINOUTS ............................................................... 1
RS-232 P INOUTS ........................................................................................................ 1
RS-422/485 P INOUTS ................................................................................................. 2
APPENDIX C: TROUBLESHOOTING WITH COMTEST ................................. 1
C OM T EST F EATURES .................................................................................................. 1
I NSTALLING C OM T EST ............................................................................................... 2
L OOPBACK T ESTING WITH C OM T EST ......................................................................... 2
APPENDIX D: DECLARATION OF CONFORMITY STATEMENT ................ 5