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Summary of Contents for Moxa Technologies A50
- Page 1 A50/A51/A60 Dec. 1999 ( 2nd Edition ) All Rights Reserved...
- Page 2 Part I - A50/A51 RS-232 to RS-422/RS-485 Converter A50/A51 RS-232 to RS-422/RS-485 Bidirectional Converter...
- Page 3 Part II - A60 RS-232 Surge Protection RS-232 Surge Protection Converter...
- Page 4 Information provided in this manual is intended to be accurate and reliable. However, Moxa Technologies assumes no responsibility for its use, or for any infringements of rights of the fourth parties which may result from its use.
- Page 5 MOXA Internet Services Customer’s satisfaction is always our number one concern. To ensure that customers get the full benefit of our services, Moxa Internet Services have been built for technical support, product inquiry, new driver update, user’s manual update, etc. The followings are the services we provide.
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Page 6: Table Of Contents
Table Of Contents Part I - A50/A51 RS-232 to RS-422/RS-485 Converter Chapter 1. Introduction ………………………………………. Overview Features and Specifications Package Check List Chapter 2. Installation ……………………………………….. Installation Procedure Switch Function Description LED Indicators RS-422/RS-485 Pinouts Chapter 3. Operation ………………………………………… Point-to-point... - Page 7 Table Of Contents Part II - A60 RS-232 Surge Protection Chapter 1. Introduction…………………………………………… Overview Features and Specifications Package Check List Chapter 2. Installation……………………………………………… Installation Procedure LED Indicators Self Test Appendix A RS-232 Pinouts and Cable Wiring…………………… Appendix B Troubleshooting ………………………………………..
- Page 9 I n t r o d u c t i o n 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.
- Page 10 A51 has one more f eature: 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.
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Page 11: Chapter 1. Introduction
SW2 : for Tx (driver) and Rx (receiver) state Isolation Protection - for A51 only, up to 2000V. Terminal Resistor - RT1 space reserved for RS-422/RS-485 receiver signal. Mounting Kit - Plastic Plates and screws for mounting A50/A51 on the wall or any surface. Mounting... - Page 13 Introduction...
- Page 15 I n s t a l l a t i o n 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 Appendix A, RS-232 Cable Wiring) and decide the operation mode as well as 2/4-wire cable (refer to Chapter 3, Operation) in advance.
- Page 16 Note: ‘ * ‘ means default settings , ‘ X ‘ means don’t care 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.
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Page 17: Chapter 2. Installation
RS-422/RS-485 interface with RJ-45 Jack connector or Terminal Block Connector is depicted as follows. RJ-45 Connector Terminal Block Connector 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 A50/A51 A50/A51 RJ-45 Jack Terminal Block Connector Pinouts Signals Connector Pinouts... - Page 19 O p e r a t i o n The A50 (or A51) supports 5 kinds of operations. They are: 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 the RJ -45 RS-422/RS-485 connector or the Terminal Block, respectively.
- Page 20 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 A50/A51 A50/A51 RS-232 RS-422/ RS-422/ RS-232 DTE/ DTE/ RS-485 TB RS-485 In the graph, TA, TB, RA and RB could be either from RJ-45 or Terminal Block.
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Page 21: Chapter 3. Operation
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. - Page 22 DTE/ RS-485 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: Pin1 Pin2 Pin3 Pin4 Half-duplex mode TxD enabled by RTS...
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Page 23: 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 the slave devices can listen only. -
Page 24: Self Test
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/ RS-232 RS-422/485 In the graph, TA, TB, RA and RB could be either from RJ-45 or Terminal Block. -
Page 25: Appendix Ars-232 Pinouts And Cable Wiring
Thus, there are two types of RS-232 cable wiring which are listed below. Type 1: To connect RS-232 side of A50/A51 to a DTE (e.g. PC COM1/2) or DCE . (Please check the precise DTE/DCE pinouts, the following DTE/DCE... - Page 26 7 GND 7 GND 8 CTS 5 RTS 9 DTR 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 A50/A51 RJ-45 Connector DB-25 Male...
- Page 27 RS-232 Pinouts and Cable Wiring A50/A51 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...
- Page 29 Note: 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.
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Page 31: Appendix C Troubleshooting
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 . -
Page 33: Part Ii - A60
I n t r o d u c t i o n 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. -
Page 34: Package Check List
X X T S T T C Remote D D R R S S D Local Fixing Screw A60 with Mounting Kit Package Check List Upon unpacking your A60 package, you should find the following items: A60 RS-232 surge protection converter Mounting Kit A50/A51/A60 User's Manual... - Page 35 I n s t a l l a t i o n 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.
- Page 36 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.
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Page 37: Chapter 2. Installation
Installation Self Test This configuration is for A60 self-test. Run terminal emulation program to see if what you received is what you typed. R S - 2 3 2 S u r g e rotection Remote Local In the above graph, all the signal lines could be either from remote site RJ -45 or Terminal Block and shorted as shown. - Page 38 A p p e n d i x R S - 2 3 2 P i n o u t s a n d C a b l e W i r i n g Below is RS-232 pinouts for RJ-45 connector or Terminal Block. RJ-45 Connector Terminal Block Connector 1 2 3 4 5 6 7...
- Page 39 Type 1: To connect RS-232 local/remote port of A60 to a DTE or DCE. DB-25 Male DB-9 Male 20 DTR DB-25 Female 20 DSR Type 2: To connect RS-232 local/remote port of A60 to a DTE with 3-pin wiring if don't care hardware flow control. DB-25 Male DB-9 Male 20 DTR...
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Page 40: Appendix Ars-232 Pinouts And Cable Wiring
RS-232 Pinouts and Cable Wiring DB-25 Female 20 DSR... -
Page 41: Appendix B Troubleshooting
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 Test.
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