Moxa A51 - Manuals

Table of Contents Part I - A50/A51 RS-232 to RS-422/RS-485 Converter Chapter 1. Introduction ………………………………………. 1 1.1 Overview 1 1.2 Features and Specifications 2 1.3 Package Check List 5 Chapter 2. Installation ……………………………………….. 7 2.1 Installation Procedure 7 2.2 Switch Function Description 7 2.3 LED...

Table of Contents Part II - A60 RS-232 Surge Protection Chapter 1. Introduction…………………………………………… 29 1.1 Overview 30 1.2 Features and Specifications 30 1.3 Package Check List 31 Chapter 2. Installation……………………………………………… 33 2.1 Installation Procedure 33 2.2 LED Indicators 34 2.3 Self Test 36 Appendix ...

1 Chapter1 Introduction 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-485signals, and vice versa. They are the best choices for those whowant to control devices ...

Introduction Chapter 1 2 Outlook of A51 1.2 Features and Specifications Features Both A50 and A51 are RS-232 to RS-422/RS-485 bidirectionalconverters except that A51 has one more feature: isolationprotection, which provides high voltage protection up to 2000V. All the switches, SW1 and SW2, of A50/A...

Chapter 1 Introduction 3 150mA power adapter or the pin 6 and pin 7 of the TerminalBlock. LED indicators are provided to show the status of datatransmitting/receiving, RTS signal and Power. To avoid over-current from the remote ground to converter'sground, an protect resistor has been added inside t...

Chapter 1 Introduction 5 1.3 Package Check List Upon unpacking your A50 or A51 package, you should find thefollowing items: v A50 (or A51) RS-232 to RS-422/RS-485 bidirectionalconverter (with isolation protection if A51) v One power adapter v Mounting Kit v A50/A51/A60 User's Manual

7 Chapter 2 Installation 2.1 Installation Procedure As RS-232 or RS-422/RS-485 port are labeled clearly on thesurface of the A50/A51 converter, please prepare the RS-232cable (refer to Appendix A, RS-232 Cable Wiring) and decidethe operation mode as well as 2/4-wire cable (refer to Chapter 3,Operati...

Chapter 2 l l Installation 8 Switch settings table of SW1 and SW2 is as follows: SW1*Full-duplex mode Off Half-duplex mode On SW2 Pin1 Pin2 Pin3 Pin4 *TxD always enabled On Off X X TxD always disabled Off Off X X TxD enabled by RTS Off On X X *RxD always enabled X X On Off RxD enabled by /RTS X X Of...

Installation l l Chapter 2 9 RxD indicator stands for data transmitting from RS-422/RS-485to RS-232. It shows red when connected and no data received. Itshows orange when connected and receiving data (In half-duplex mode, it shows red when line is not connected due to thecharacteristics of ICs for R...

Chapter 2 l l Installation 10 A50/A51 A50/A51 RJ-45 Jack Terminal Block Connector Pinouts Signals Connector Pinouts Signals 1 nc 1 TxD B 2 nc 2 TxD A 3 GND 3 RxD B 4 TxD B 4 RxD A 5 TxD A 5 GND 6 RxD A 6 Power GND 7 RxD B 7 Power Input 8 GND 9 nc 10 nc(not connected) Note : Pin 6 and Pin 7 of Termin...

Operation l l Chapter 3 15 In the graph, TA, TB, RA and RB could be either from RJ-45 orTerminal Blocks. The settings of the switches for each A50 (orA51) are as follows: SW1Full-duplex mode Off SW2 for Master Pin1 Pin2 Pin3 Pin4 TxD always enabled On Off X X RxD always enabled X X On Off SW2 for Sl...

Operation l l Chapter 3 17 In the graph, TA, TB, RA and RB could be either from RJ-45 orTerminal Block. The settings of the switches for each A50 (orA51) are as follows: SW1 SW2 Pin1 Pin2 Pin3 Pin4 Half-duplex mode On TxD enabled by RTS Off On X X RxD enabled by / RTS X X Off On 3.3 Simplex/Transmit...

~ 21 ~ Appendix A RS-232 Pinouts & Cable Wiring RS-232 interface with RJ-45 connector is depicted as follows. RJ-45 Connector A50/A51 RJ-45Connector Pinouts RS-232 Signals 1 DCD Always On 2 DSR 3 RTS 4 GND 5 TxD 6 RxD 7 GND 8 CTS 9 DTR 10 - 1 2 3 4 5 6 7 8 9 10

Appendix A l l RS-232 Pinouts and Cable Wiring 22 Note : Each group of (RTS, CTS) and (DTR, DSR) pins havebeen shorted on A50/A51, which release the users fromthe hardware flow control cable wiring problem. Thus,there are two types of RS-232 cable wiring which arelisted below. Type 1 : To connect RS...

RS-232 Pinouts and Cable Wiring l l Appendix A 23 A50/A51 DCE RJ-45 Connector DB-25 Female 1 DCD 8 DCD 2 DSR 6 DTR 3 RTS 4 CTS 5 TxD 2 RxD 6 RxD 3 TxD 7 GND 7 GND 8 CTS 5 RTS 9 DTR 20 DSR Type 2: To connect RS-232 side of A50/A51 to a DTE, e.g. terminal or PC COM1/2, with 3-pin wiring if don'tcare H...

Appendix A l l RS-232 Pinouts and Cable Wiring 24 A50/A51 DCE RJ-45 Connector DB-25 Female 5 TxD 2 RxD 6 RxD 3 TxD 7 GND 7 GND 3 RTS 4 CTS 8 CTS 5 RTS 2 DSR 6 DTR 9 DTR 20 DSR 1 DCD 8 DCD

~ 25 ~ A p p e n d ix B I m p e d a n c e M at c h i ng a n d T er m in at io n R e si sto rs When an electrical signal travels through two differentresistance junctions in a transmission line, the mismatch willsometimes cause signal reflection. Signal reflection causessignal distortion, which in tu...

Appendix B l l Impedance Matching and Termination Resistors 26 Note: 1. stands for termination resistor near the receiving side. RT1 is the space reserved inside A50/A51 forthis purpose. 2. The suggested termination resistor for AWG #26 cable is 100 ohm. 3. The suggested termination resistor for pho...

~ 27 ~ Appendix C Troubleshooting Q1. Failure of data transmission. Solutions: 1. Check that the right power adapter is applied.2. Check that the RS-232 link is proper.3. Check that the RS-422/RS-485 link is proper.4. Check that the SW1 and SW2 are set properly. Q2. Data loss or error. Solution: Che...

~ 29 ~ Chapter 1 Introduction 1.1 Overview The MOXA RS-232 Surge Protection converter, A60, isdesigned to protect the RS-232 communication line from TOV(Transient Over Voltages) which comes from lightning,electrostatic discharge and other forms. TOV is always themajor factor which damages components...

Introduction • • Chapter 1 ~ 31 ~ A60 with Mounting Kit 1.3 Package Check List Upon unpacking your A60 package, you should find thefollowing items: v A60 RS-232 surge protection converter v Mounting Kit v A50/A51/A60 User's Manual MountingScrew Fixing Screw T X D R X D R T S P W R Remote Local P rot...

~ 33 ~ hapter 2 Installation 2.1 Installation Procedure Even though the local and remote ports of A60's are labeled onthe surface of the A60 converter, please take care whenconnecting the cables to the A60 and the hosts. Note that thesurge from both the local and the remote site is blocked by theA60...

Installation • • Chapter 2 ~ 35 ~ RxD indicator (signal from remote port ) Green : when connected correctly and no data receiving. Orange : when receiving data from remote to local site. DTR/RTS indicators (signal from local port) Red : when connected and DTR (or RTS) signal turned on. Green : when ...

Chapter 2 • • Introduction ~ 36 ~ 2.3 Self Test This configuration is for A60 self-test. Run terminal emulationprogram to see if what you received is what you typed. In the above graph, all the signal lines could be either fromremote site RJ-45 or Terminal Block and shorted as shown. P rotection A60...

~ 37 ~ ppendix A RS-232 Pinouts and Cable Wiring Below is RS-232 pinouts for RJ-45 connector or TerminalBlock. A60 RJ-45 A60 Terminal Block Connector Pinouts Signals Connector Pinouts Signals 1 DCD 1 TxD 2 DSR 2 RxD 3 RTS 3 DTR 4 GND 4 DSR 5 TxD 5 RTS 6 RxD 6 CTS 7 GND 7 GND 8 CTS 9 DTR 10 - A 1 2 3...

Appendix A • • RS-232 Pinouts and Cable Wiring ~ 38 ~ There are two types of RS-232 cable wiring which are listedbelow. Note: 1. Terminal Block supports no DCD signal. 2. DTE: Data Terminal Equipment like terminal or PC COM1/2; DCE: Data Communication Equipmentlike modem. Please check the precise DT...

ppendix B Troubleshooting Q1. Failure of data transmission. Solutions: Check that the RS-232 link is proper. Q2. Data loss or error. Solution: 1. Check that the data rate, data format are the same for both devices. 2. Surge occurs during the data transferring. Error detection and recovery should be ...