Moxa Technologies A51 Surge Protector User Manual
Contents
1. 6 DSR 38 RS 232 Pinouts and Cable Wiring Appendix A DCE A60 DB 25 Female DCD 8 DCD DSR 6 DTR RTS 4 CTS TxD 2 RxD RxD 3 TxD GND 7 GND CTS 5 RTS DTR 20 DSR Type2 To connect RS 232 local remote port of A60 to a DTE with 3 pin wiring if don t care hardware flow control DTE DTE A60 DB 25 Male A60 DB 9 Male TxD 3 RxD TxD 2 RxD RxD 2 TxD RxD 3 TxD GND 7 GND GND 5 GND RTS 5 CTS RTS 8 CTS CTS 4 RTS CTS 7 RTS DSR 20 DTR DSR 4 DTR DTR 6 DSR DTR 6 DSR DCD 8 DCD DCD 1 DCD 39 Appendix A RS 232 Pinouts and Cable Wiring DCE A60 DB 25 Female TxD 2 RxD RxD 3 TxD GND 7 GND RTS 4 CTS CTS 5 RTS DSR 6 DTR DTR 20 DSR DCD 8 DCD 40 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 taken in applications Q3 How do I do self test on A50 Solution Refer to Chapter 2 3 Self Test2. Troubleshooting 28 Chanter 1 Introduction 1 1 Overview The MOXA RS 232 Surge Protection converter A60 is designed to protect the RS 232 communication line from TOV Transient Over Voltages which comes from lightning electrostatic discharge and other forms TOV is always the major factor which damages components and makes ports unreliable To improve this problem we add Transient Voltage Suppressor to our I O ports to clamp surge voltage to protect ports from TOV Due to the impulse signal generated by inductive devices in factory the surge protection is best suited for the factory automation applications dies rotection RJ 45 Connector DRCD o Power Jack Remote RS SD Local Not used EE RS 232 RJ 45 Connector Outlook of A60 29 Chapter 1 Introduction 1 2 Features and Specifications Features A60 s main feature is surge protection up to 2000V No switch is needed No power is needed LED indicators are provided to show the status of data transmitting receiving modem control signals and DCD Specifications V RS 232 RJ 45 Connectors supports TxD RxD DTR DSR RTS CTS GND DCD RS 232 Terminal Block supports TxD RxD DTR DSR RTS CTS GND LED Indicators for TxD RxD DTR DSR RTS CTS DCD Surge Protection up to 2000V preventing surge from remote site Mounting Kit plastic plates and screws for mounting A60 on the wall
3. added inside the A50 A51 Specifications lt lt lt lt V Power Supply DC 9V to 30V 150mA Data Rate Up to 921600 bps under 500 ft 0 15 Km Distance Up to 4000 ft 1 2 Km under 115200 bps RS 232 RJ 45 Connector Supports TxD RxD DTR DSR RTS CTS DCD GND RS 422 RS 485 RJ 45 Connector Supports TxDA TxDB RxDA RxDB GND V V RS 422 RS 485 Terminal Block Connector Supports TxDA TxDB RxDA RxDB GND PWR PWR GND Switch SWI for full half duplex mode SW2 for Tx driver and Rx receiver state Introduction Chapter 1 Isolation Protection for A51 only up to 2000V Terminal Resistor RT1 space reserved for RS 422 RS 485 receiver signal v Mounting Kit Plastic Plates and screws for mounting A50 A51 on the wall or any surface Mounting Screw REP toRBQD 45 J n erter RS 422 485 Fixing Screw A50 A51 with Mounting Kit Chapter 1 Introduction 1 3 Package Check List Upon unpacking your A50 or A51 package you should find the following items v ASO or A51 RS 232 to RS 422 RS 485 bidirectional converter with isolation protection if A51 One power adapter Mounting Kit A50 A51 A60 User s Manual Introduction Chapter 1 Chanter 2 Installation 2 1 Installation Procedure As RS 232 or RS 422 RS 485 port are labeled clearly on the surface of the A50 A51 converter please prepare the RS 232 cable refer to Ap
4. is used 33 Chapter 2 Introduction 2000 V Surge 32 Surge BETEN rotection gt TR DDRCD o LETETTE Remote DDRRSSD Local To gooooo b f To Remote 7 gt Local Host Host Earth Ground Please prepare the RS 232 cables referring to Appendix A RS 232 Cable Wiring 2 2 LED Indicators There are LED indicators for TxD RxD DTR DSR RTS CTS and DCD on top of A60 The indicators are not lighted on when not connected with signals On the contrary they will be lighted on and be one of the red green or orange colors TxD indicator signal from local port Green when connected correctly and no data transmitting Orange when transmitting data from local to remote site 34 Installation Chapter 2 RxD indicator signal from remote port Green when connected correctly and no data receiving Orange when receiving data from remote to local site DTRIRTS indicators signal from local port Red When connected and DTR or RTS signal turned on Green when connected and DTR or RTS signal turned off DSR CTS DCD indicators signal from remote port Red When connected and DSR or CTS DCD signal turned on Green when connected and DSR or CTS DCD signal turned off 35 Chapter 2 Introduction 2 3 Self Test This configuration is for A60 self test Run terminal emulation program to see if what you receive
5. or any surface 30 Introduction Chapter 1 Mounting Screw R232 Surge rotection Fixing Screw A60 with Mounting Kit 1 3 Package Check List Upon unpacking your A60 package you should find the following items v A60 RS 232 surge protection converter v Mounting Kit v A50 A51 A60 User s Manual 31 Chapter 1 Introduction 32 hapter 2 Installation 2 1 Installation Procedure Even though the local and remote ports of A60 s are labeled on the surface of the A60 converter please take care when connecting the cables to the A60 and the hosts Note that the surge from both the local and the remote site is blocked by the A60 However the LED indicators and the local host are under surge protection if and only if the surge comes in from the remote port of A60 Hence it is recommended to keep A60 as close as possible to the local host Otherwise you may risk damaging the A60 itself as well as the local host if surge occurs between the A60 s local port and the host In addition you may need a couple of A60s if both local and remote hosts are to be protected from surge Note that remote port and Terminal Block are actually the same except that DCD signal is not available in Terminal Block It is recommended to connect GND at the Terminal Block to the earth ground to provide a ground path to prevent electric shock caused by lightning no matter RJ 45 or Terminal Block
6. the slave devices can listen only Chapter 3 Operation 50 51 50 51 DTE RS 232 DCE RS 422 RS 485 RS 422 RS 485 RS 232 DTE DCE 50 51 RB RS 422 TB RS 485 RS 232 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 51 are as follows Operation Chapter 3 3 4 Self Test This configuration is for A50 A51 self test Run terminal emulation program to see if what you received is what you typed A50 A51 DTE gt RS 232 DCE TA TB L RB RA RS 422 485 GND 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 Chapter 3 Operation 20 Appendix A RS 232 Pinouts amp Cable Wiring RS 232 interface with RJ 45 connector is depicted as follows RJ 45 Connector A50 A51 RJ 45 Connector Pinouts RS 232 Signals OoN 21 DCD Always On DSR 4 RTS GND TxD RxD GND CTS DTR Appendix A RS 232 Pinouts and Cable Wiring Note Each group of RTS CTS and DTR DSR pins have been shorted on A50 A51 which release the users from the hardware flow control cable wiring problem Thus there are two types of RS 232 cable wiring which are listed below 1 T
7. A50 A51 A60 Feb 1997 1st Edition All Rights Reserved Part I A50 A51 RS 232 to RS 422 RS 485 Converter A50 A51 RS 232 to RS 422 RS 485 Bidirectional Converter Part II A60 RS 232 Surge Protection A60 RS 232 Surge Protection Converter Copyright Notic This documentation is copyrighted by Moxa Technologies Co Ltd All rights are reserved Moxa Technologies reserves the right to make improvements to the products described in this manual at any time without notice Information provided in this manual is intended to be accurate and reliable However Moxa Technologies assumes no responsibility for its use nor for any infringements of rights of the fourth party which may result from its use MOXA is a registered trademark of Moxa Technologies Co Ltd The other trademarks in this manual belong to their manufacturers individually Turm FC inte Unline Aecess Server i B Moxa Technologies Co Ltd Tel 866 2 8665 6373 Fax 886 2 8665 6372 www moxa com tw support moxa com tw 0 X Moxa Internet Services P Customer s satisfaction is always our number one concern To ensure customers get the full benefit of our services Moxa Internet Services MIS have been built for technical support product inquiry new driver upgrade etc The followings are the services we provide E mail for technical support address support moxa com tw Ftp site for free driver
8. at longer distance and or 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 Outlook of 50 N A Power Jack RS 232 RJ 45 Connector Introduction Chapter 1 RS 422 485 RJ 45 Connector Power Jack L RS 232 RJ 45 Connector Outlook of A51 1 2 Features and Specifications Features Both A50 and A51 are RS 232 to RS 422 RS 485 bidirectional converters except that A51 has one more feature isolation protection which provides high voltage protection up to 2000V All the switches SW1 and SW2 of A50 A51 are designed to be inside of the converter to protect switch settings from unintended change and introducing communication error without any warning Hence it is necessary to take the two screws off and open the cover up if you need to change the operation mode via sliding the switches The 50 51 must be powered either from a DC 9V to 30 2 Chapter 1 Introduction 150mA power adapter or the pin 6 and pin 7 of the Terminal Block LED indicators are provided to show the status of data transmitting receiving RTS signal and Power To avoid over current from the remote ground to converter s ground an protect resistor has been
9. d all together to communicate one another through many A50 or A51 devices In this configuration one of the A50 or A51 will be connected to a master device and the rest of A50 or A51 devices will be connected to any other slave devices 4 wire Full Duplex 50 51 50 51 Master RA Slave DTE gt 28232 RS485 RB 85 485 RS232 DTE um DCE TA DCE 50 51 Slave RB RS 485 RS 232 DTE DCE GND 14 Operation Chapter 3 In the graph TA TB RA and RB could be either from RJ 45 or Terminal Blocks The settings of the switches for each A50 or 51 are as follows SWI Full duplex mode Off 2 wire Half Duplex Chapter 3 50 51 Master DCE RA DTE gt RS 232 RB TA Operation 50 51 RA Slave RB RS 232 DTE TB DCE TA RA Slave RB RS 232 lt DTE TB 1 DCE TA GND 865 485 Operation Chapter 3 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 51 are as follows 3 3 Simplex Transmit Receive Simplex configuration means that more than two devices Max 10 for RS 422 Max 32 for RS 485 can be linked all together to communicate through many A50 A51 devices Its configuration is like the Multidrop s but the master device can talk only and
10. d is what you typed AS cO R232 Surge rotection o Ox DAO 200 OAD Remote Local me In the above graph all the signal lines could be either from remote site RJ 45 or Terminal Block and shorted as shown 36 ppendix A RS 232 Pinouts and Gable Wiring Below is RS 232 pinouts for RJ 45 connector or Terminal Block RJ 45 Connector Terminal Block Connector 12345678910 1234567 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 37 Appendix A RS 232 Pinouts and Cable Wiring There are two types of RS 232 cable wiring which are listed below Note 1 Terminal Block supports no DCD signal 2 DTE Data Terminal Equipment like terminal or PC COMI 2 DCE Data Communication Equipment like modem Please check the precise DTE DCE pinouts the following DTE DCE pinouts is just an example 1 To connect RS 232 local remote port of A60 to a DTE or DCE DTE DTE A60 DB 25 Male A60 DB 9 Male DCD 8 DCD DCD 1 DCD DSR _ 20 DTR DSR 4 DTR RTS 5 CTS RTS 8 CTS TxD 3 RxD TxD 2 RxD RxD 2 TxD RxD 3 TxD GND 7 GND GND 5 GND CTS 4 RTS CTS 7 RTS DTR 6 DSR DTR
11. e RJ 45 RS 422 RS 485 connector or the Terminal Block respectively Note Note If possible connect GND of both sides together to gain better signals That is you may need one more GND connection in addition to 4 wire or 2 wire connection For A51 connecting GND at the Terminal Block to the earth ground to provide a ground path to prevent electric shock caused by lightning no matter RJ 45 or Terminal Block RS 422 RS 485 is used 11 Chapter 3 Operation 3 1 Point to point Point to point configuration means two devices which locate at two different places can be linked together to communicate through a couple of A50 or A51 converters 4 wire Full Duplex 50 51 50 51 DTE gt 5 222 RS422 TB RS 422 RS 232 lt DTE DCE 68 485 RB RS 485 DCE RA 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 51 are as follows Operation Chapter 3 2 wire Half Duplex A50 A51 50 51 RA DTE gt RS 232 TB RB RS 232 lt DTE DCE TB DCE RA TA RS 485 GND GND 85 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 51 are as follows Chapter 3 Operation 3 2 Multidrop Multidrop configuration means that more than two devices Max 10 for RS 422 Max 32 for RS 485 can be linke
12. ignal turned on It shows green when connected and RTS signal turned off PWR indicator is red when power is on and not lighted when power is off or not connected 2 4 RS 422 RS 485 Pinouts RS 422 RS 485 interface with RJ 45 Jack connector or Terminal Block Connector is depicted as follows RJ 45 Connector Terminal Block Connector III 12345678910 1234567 Chapter 2 Installation A50 A51 Terminal Block Connector Pinouts Signals TxD B TxDA RxD B RxDA GND Power GND Power Input nc not connected Pin 6 and Pin 7 of Terminal Block are for Power GND and Power Input which is an alternate option for power adapter Be careful that DO NOT confuse RS 422 RS 50 51 RJ 45 Jack Connector Pinouts Signals 1 nc 2 nc 3 GND 4 TxD B 5 TxDA 6 RxDA 7 RxD B 8 GND 9 nc 10 Note 485 GND with Power GND Note Under half duplex mode SW1 in ON mode the couples of TxD B RxD B and TxD A RxD A are shorted inside the converter for convenience Users can save the trouble with shorting the wires 10 The A50 or A51 supports 5 kinds of operations They are lt Point to point 4 wire Full Duplex Point to point 2 wire Half Duplex Multidrop 4 wire Full Duplex Multidrop 2 wire Half Duplex Simplex Transmit Receive Only All the operations are to be described below And TA TB RA and RB represent TxD A TxD B RxD A and RxD B signal lines of th
13. o connect RS 232 side of A50 A51 to a DTE e g PC COM 1 2 DCE Please check the precise DTE DCE pinouts the following DTE DCE pinouts is just an example A50 A51 DTE A50 A51 DTE RJ 45 Connector DB 25 Male RJ 45 Connector DB 9 Male 1 DCD 8 DCD 1 DCD 1 DCD 2 DSR 20 DTR 2 DSR 4 DTR 3 RTS 5 CTS 3 RTS 8 CTS 5 TxD 3 RxD 5 TxD 2 RxD 6 RxD 2 TxD 6 RxD 3 TxD 7 GND 7 GND 7 GND 5 GND 8 CTS 4 RTS 8 CTS 7 RTS 9 DTR 6 DSR 9 DTR 6 DSR 22 RS 232 Pinouts and Cable Wiring Appendix A 50 51 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 t care Hardware flow control A50 A51 DTE 50 51 DTE RJ 45 Connector DB 25 Male RJ 45 Connector DB 9 Male 5 TxD 3 RxD 5 TxD 2 RxD 6 RxD 2 TxD 6 RxD 3 TxD 7 GND 7 GND 7 GND 5 GND 3 RTS 5 CTS 3 RTS 8 CTS 8 CTS 4 RTS 8 CTS 7 RTS 2 DSR 20 DTR 2 DSR 4 DTR 9 DTR 6 DSR 9 DTR 6 DSR 1 DCD 8 DCD 1 DCD 1 DCD 23 Appendix A RS 232 Pinouts and Cable Wiring 50 51 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 24 AnnendkB ImpedansM atching and Termination Resistors When an electrical signal travels through t
14. pendix A RS 232 Cable Wiring and decide the operation mode as well as 2 4 wire cable refer to Chapter 3 Operation in advance Take off the two screws on top of the converter and open the cover up if you need to change the operation mode via sliding the switches 2 2 Switch Function Description ON um SWI sw2 9 9 E E Inside look of A50 A51 7 Chapter 2 Installation Switch settings table of SW1 and SW2 is as follows SWI Full duplex mode Half duplex mode Note means default settings X means don t care 2 3 LED Indicators There are LED indicators for TxD RxD RTS and PWR on top of A50 A51 The indicator is not lighted on when not connected with signal or power On the contrary it will be lighted on and be in one of the red green or orange colors TxD indicator stands for data transmitting from RS 232 to RS 422 RS 485 It shows green when connected and no data transmitting It shows orange when connected and transmitting data Installation Chapter 2 RxD indicator stands for data transmitting from RS 422 RS 485 to RS 232 It shows red when connected and no data received It shows orange when connected and receiving data In half duplex mode it shows red when line is not connected due to the characteristics of ICs for RS 485 RTS indicator is for RS 232 RTS signal It shows red when connected and RTS s
15. upgrade address ftp moxa com or ftp moxa com tw userID ftp password your email address World Wide Web WWW for product info address www moxa com www moxa com tw Part I A50 A51 RS 232 to RS 422 RS 485 Converter Chapter 1 Chapter 2 2 1 2 2 2 3 2 4 Chapter 3 3 1 3 2 3 3 3 4 Appendix A Appendix B Appendix C Table of Contents Qum a Introduction Overview Features and Specifications Package Check List Installation Installation Procedure Switch Function Description LED Indicators RS 422 RS 485 Pinouts Operation Point to point Multidrop Simplex Transmit Receive Self Test RS 232 Pinouts and Cable Wiring Impedance Matching and Termination Resistors Troubleshooting 2 Table of Contents Part II A60 RS 232 Surge Protection Chapter 1 13 Chapter 2 2 1 2 2 2 3 Appendix A Appendix B Introduction Overview Features and Specifications Package Check List Installation Installation Procedure LED Indicators Self Test RS 232 Pinouts and Cable Wiring Troubleshooting 29 30 30 31 33 33 34 36 37 41 Chapter 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
16. wo different resistance junctions in a transmission line the mismatch will sometimes cause signal reflection Signal reflection causes signal distortion which in turn will contribute communication errors The solution to this problem is to establish the same impedance at the line ends as in the line itself by terminating them with resistors It is normally sufficient when the value of the termination resistor equals the characteristic impedance of the transmission line The resistors should be added near the receiving side For example 50 51 TxDA TxDB RxDA RxDB T 4 25 Remote site RxDA RxDB TxDA TxDB Appendix B Impedance Matching and Termination Resistors Note 1 5 stands for termination resistor near the receiving side RT1 is the space reserved inside A50 A51 for this purpose 2 The suggested termination resistor for AWG 26 cable is 100 ohm 3 The suggested termination resistor for phone cable is 600 ohm 26 Appendix 6 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 Check that the data rate data format are the same for both devices Q3 How do I do self test on A50 A51 Solution Refer to Chapter 3 4 Self Test 27 Appendix C
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