SE-485-DIN

SE-485-DIN MANUAL OPTICALLY ISOLATED RS-232 TO RS-422/485 CONVERTER November 9, 2004 Revision P1 Copyright  2004 by Startco Engineering Ltd. All rights reserved. Publication: SE-485-DIN-M Document: S95-485-00000 Printed in Canada. Startco Engineering Ltd. SE-485-DIN Converter TABLE OF CONTENTS PAGE Table of Contents .................................................................... i List of Figures.........................................................................ii List of Tables ..........................................................................ii 1. 1.1 1.2 Introduction .............................................................. 1 General ........................................................................ 1 Description .................................................................. 1 2. Installation ................................................................. 2 3. Operation and Setup ................................................ 2 4. Technical Specifications ...................................... 3 LIST OF FIGURES 1 PAGE Outline and Configuration Details ............................. 1 LIST OF TABLES 3.1 3.2 PAGE Typical Communication Setups ................................. 2 Baud Rate Selection.................................................... 2 Pub. SE-485-DIN-M, November 9, 2004 Page i Rev. P1 Startco Engineering Ltd. SE-485-DIN Converter DISCLAIMER Specifications are subject to change without notice. Startco Engineering Ltd. is not liable for contingent or consequential damages, or for expenses sustained as a result of incorrect application, incorrect adjustment, or a malfunction. This product has a variety of applications. Those responsible for its application must take the necessary steps to assure that each installation meets all performance and safety requirements including any applicable laws, regulations, codes, and standards. Information provided by Startco is for purposes of example only. Startco does not assume responsibility for liability for use based upon the examples shown. Pub. SE-485-DIN-M, November 9, 2004 Page ii Rev. P1 Startco Engineering Ltd. SE-485-DIN Converter 1. INTRODUCTION 1.1 GENERAL Startco Engineering Ltd. purchases the 485LDRC9 from B&B Electronics Ltd and modifies this component to create the SE-485-DIN. Sections of this manual were taken from the B&B Electronics publication “485LDRC91903-1/3”, tables were revised to reflect our unique application. The SE-485-DIN optically isolates and converts unbalanced, full or half-duplex RS-232 signals to optically isolated, balanced, full or half-duplex RS-422 or RS-485 signals at baud rates up to 115.2 kbps. This unit also surge suppresses the RS-422/485 lines. It features Send Data Control circuitry so no software control of handshake lines is required in RS-485 mode. FIGURE 1 Outline and Configuration Details Pub SE-485-DIN-M, November 9, 2004 Page 1 Rev. P1 Baud rate is switch selectable from 9600 baud to 57600 baud. In two-wire RS-485 mode, the SE-485-DIN is compatible with all Startco products with the RS-, EIA-, or TIA-485 interface. 1.2 DESCRIPTION Three LED’s indicate RS-485 Transmit Data, RS-485 Receive Data, and Power. The SE-485-DIN has terminal blocks on the RS-232 side and the RS-422-485 side. The RS-232 side also has a DB9 female connector. Transmit (TD), Receive (RD) and Ground are supported on the RS-232 side. The unit is powered by a supply voltage of 10 to 30 Vdc on the RS-232 side. Transmit Data A (-), Transmit Data B (+), Receive Data A (-), Receive Data B (+), and Ground are supported on the RS-422/RS-485 side. Communication features on the SE-485-DIN are dipswitch selectable on the unit. Startco Engineering Ltd. SE-485-DIN Converter Page 2 Rev. P1 2. INSTALLATION 3. OPERATION AND SETUP The SE-485-DIN is DIN rail mountable. Switch 1, 2, 3, and 4 select the interface mode. For Startco applications set Switch 1, 2, 3, and 4 to ON. Use terminal G (-) and H (+) for network connection. Send Data Control recognizes the first bit of data from the RS-232 side, enables the transmitter and disables the receiver. After the last bit of data is sent from the RS-232 side and a one-character timeout has occurred, the transmitter is disabled and receiver is enabled. For 9600 to 57600 baud the timeout is selected with dipswitches. For other baud rates, the timeout is set by R11 inside the unit (see Table 3.2). A 120 Ω termination resistance is selected with Switch 5. To remove Converter from Din Rail: • Place a flat-blade screwdriver blade in disengage clip on the converter enclosure. • Gently pry on screwdriver handle. • Rock enclosure toward you to release it from the DIN rail. TABLE 3.1 TYPICAL COMMUNICATION SETUPS Switch 1 Switch 2 TX Enable RX Enable ON ON RS-485 2-Wire Mode (Startco setting) ON OFF RS-485 4-Wire Mode (2) RS-422 4-Wire Mode OFF (1) OFF (2) Switch 3, 4 Both ON (3) Both OFF (4) Both OFF (4) (1) Transmitter always ON. Receiver always ON. (3) For 2-wire mode, terminal G (TDA) is connected to K (RDA) and terminal H (TDB) is connected to L (RDB). (4) For 4-wire mode, G (TDA) and H (TDB) are the transmit pair and K (RDA) and L (RDB) are the receiver pair. (2) TABLE 3.2 BAUD RATE SELECTION Switch 6 Switch 7 OFF OFF 1200 OFF OFF 2400 OFF OFF 4800 OFF OFF 9600* OFF ON 19200* ON OFF 38400* ON ON 57600* OFF OFF 115200 *Switch Selectable Pub SE-485-DIN-M, November 9, 2004 Switch 8 OFF OFF OFF ON OFF OFF OFF OFF R11 820 kΩ 430 kΩ 200 kΩ Not Installed Not Installed Not Installed Not Installed 8.2 kΩ Timeout (ms) 8.33 4.16 2.08 1.04 .540 .260 .176 .0868 Startco Engineering Ltd. SE-485-DIN Converter 4. TECHNICAL SPECIFICATIONS Supply .................................... +10 to 30 Vdc @ 100 mA Temperature Range ................ -40 to +80°C Humidity Range ..................... 0 to 95% non-condensing Data Rates .............................. 1200 bps to 115200 bps 9600 bps to 57600 bps switch selectable (1) See Table 3.2 Isolation.................................. 2000 Vac optical isolation of data signals and ground Surge Suppression .................. 7.5 v, bi-directional avalanche breakdown device. 500 W peak power dissipation. Clamping Time.......................