Moxa Technologies A51, A60 manual Introduction, Overview

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Chapter1Introduction

1.1 Overview

The MOXA RS-232 to RS-422/RS-485 bidirectional converters, A50 and A51, are designed to convert unbalanced (single-ended) RS-232 signals to balanced (differential) RS-422/RS-485 signals, and vice versa. They are the best choices for those who want to control devices at longer distance and/or to communicate with several devices via merely one link, particularly in the industry area. Point-to-point, multidrop and simplex operations are available for most users' needs.

RS-422/485

RJ-45 Connector

RS-422/485

RS-232toRS-422/485
Converter
A50
T	R	R	P
X	X	T	W	RS-232
D	D	S	R	RS-232

Power Jack

RS-232

RJ-45 Connector

Outlook of A50

1

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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