Moxa Technologies A51, A60 manual Wire Half Duplex

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Operation

Chapter 3

 

 

2-wire Half Duplex

 

 

 

 

A50/A51

 

 

 

 

 

 

 

 

 

 

 

RS-232

 

 

 

TA

DTE/

 

 

 

 

 

TB

DCE

 

 

 

 

RB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RA

 

 

 

 

 

 

 

RS-485 GND

A50/A51

 

RA

 

 

 

 

RB

 

 

RS-232

 

 

 

 

TB

 

 

 

 

 

 

 

 

TA

 

 

 

 

 

RS-485

 

GND

 

 

 

 

 

 

 

DTE/

DCE

In the graph, TA, TB, RA and RB could be either from RJ-45 or Terminal Block. The settings of the switches for each A50 (or

A51) are as follows:

SW1

Half-duplex mode On

SW2

Pin1

Pin2

Pin3

Pin4

TxD enabled by RTS

Off

On

X

X

RxD enabled by / RTS X

X

Off

On

13

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Contents A50/A51/A60 A50/A51 A60 Copyright Notice Moxa Internet Services Table of Contents Part II A60 RS-232 Surge Protection Page Overview IntroductionIntroduction Features and SpecificationsSpecifications A50/A51 with Mounting Kit Package Check List Introduction Switch Function Description Installation ProcedureSwitch settings table of SW1 and SW2 is as follows LED IndicatorsRS-422/RS-485 Pinouts A50/A51 RJ-45 Jack Terminal Block Connector Pinouts Signals Chapter Operation Point-to-point Wire Full DuplexWire Half Duplex Multidrop SW1 DTE Simplex/Transmit, Receive A50/A51A50/A51 Self Test Operation Appendix a RS-232 Pinouts & Cable Wiring Appendix a RS-232 Pinouts and Cable Wiring Appendix a RJ-45 Connector DB-25 Female P e n dxi B Appendix B Impedance Matching and Termination Resistors Appendix C Troubleshooting Appendix C Troubleshooting Chapter Introduction Features A60 with Mounting Kit ~32~ Installation TxD indicator signal from local port RxD indicator signal from remote port ~36~ Ppendix a Appendix a ∙ RS-232 Pinouts and Cable Wiring ∙ ~40~ Ppendix B