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/			RS-232				TB
DCE							RB
							RB
							RA
							RA

RS-485 GND

A50/A51

	RA
	RB				RS-232
	RB				RS-232
	TB
	TB
	TA
	TA			RS-485
	GND
	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

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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