Connect Tech DFlex-4/104

Chapter 4: Appendix F - RS-485/422 Options 4-21

DFlex-4/104 User's Manual, ver. 0.04

RS-485/422 Cable Wiring

You can wire DFlex-4/104 adapters with the RS-485/422 option

in various ways to communicate with RS-485/422 peripherals.

This section will descibe a few examples of RS-485/422 cabling

schemes.

Figure 15 describes a 4 wire cabling scheme between a port on

the DFlex-4/104 adapter to a port on the RS-485/422 peripheral.

Figure 15: RS-485/422 wiring diagram (4 wire)

RTS +

RTS -

CTS +

CTS -

TxD +

TxD -

RxD +

RxD -

RxD + TxD +

RxD - TxD -

RTS -

CTS -

RTS +

CTS +

SR SR

DFlex-4/104 adapter RS-485 peripheral

Figure 16 describes a 2 wire cabling scheme between a port on

the DFlex-4/104 adapter to a port on the RS-485/422 peripheral.

Figure 16: RS-485/422 wiring diagram (2 wire)

RTS +

RTS -

CTS +

CTS -

TxD +

TxD -

RxD +

RxD -

RxD + TxD +

RxD - TxD -

RTS -

CTS -

RTS +

CTS +

SR SR

DFlex-4/104 adapter RS-485 peripheral

Contents

Main Connect Tech Inc. DFlex-4/104 Page LIMITED WARRANTY Copyright Notice Trademark Acknowledgment Page Page Table of Contents Page List of Tables List of Figures Page Chapter 1: Introduction Page Page Page Page Page Chapter 1: Introduction 1-5 DFlex-4/104 User's Manual, ver. 0.04 Figure 2: DFlex-4/104 - 16 port configuration Page Page Page Page Page Chapter 2: Hardware Installation Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Chapter 3: Software Installation Page Page Page Page Utilities Chapter 4: Appendices Page Appendix A: Specifications Page Appendix B: Connectors/Pinouts Page Page Page Appendix C: Factory Settings Page Page Page Appendix D: SLIM Insertion/Removal Page Appendix E: RS-232 SLIM Option Page Page 4-16 Chapter 4: Appendix E - RS-232 Option Table 8: SLIM pinouts Note: earlier versions of the current loop SLIM have pins 22, 23, 32, and 33 tied low. Appendix F: RS-485/422 Options Page Chapter 4: Appendix F - RS-485/422 Options 4-19 DFlex-4/104 User's Manual, ver. 0.04 Figure 14: RS-485/422 SLIM partial schematic 4-20 Chapter 4: Appendix F - RS-485/422 Option Table 9: SLIM pinouts Note: earlier versions of the current loop SLIM have pins 22, 23, 32, and 33 tied low. Page Page Appendix G: RS-423 Options Page Chapter 4: Appendix G - RS-423 Options 4-25 Table 10: SLIM pinouts Note: earlier versions of the current loop SLIM have pins 22, 23, 32, and 33 tied low. Page Appendix H: 20mA Current Loop Option Page Page 4-30 Chapter 4: Appendix H - 20mA Current Loop Table 11: SLIM pinouts Note: earlier versions of the current loop SLIM have pins 22, 23, 32, and 33 tied low.