RS-232 - RS-485 INTERFACE CONVERTER IC-485S & IC-485SI User’s Manual @Copyright 1994 ATEN@ International CO., LTD. Manual part NO.
PACKAGE CHECKLIST When you purchase this product, it should contain the following elements: x1 l IC-485S or IC-485SI Converter l Power Adapter (DC9V, 200mA) l IC-485S & IC-485SI User’s Manual x 1 x1 Attention: To prevent electric shock caused by lightening, you must provide a ground path by connecting a wire from the Grounding Tab to the earth ground (for IC-485SI only).
FUNCTION OVERVIEW IC-485S/IC-485SI 1 FUNCTION OVERVIEW TABLE OF CONTENTS l-l INTRODUCTION 1 FUNCTION OVERVIEW ............. 1 l-l Introduction ....................... 1 l-2 Specifications. ..................... 2 2 INSTALLATION .................... 3 2- 1 Installation Procedure. ............... 3 2-2 Switch Function Description .......... 4 3 OPERATION ....................... 6 The IC-485S and IC-485SI are a series of a bi-directional interface converters for RS-232 and RS485.
FUNCTION OVERVIEW IC-485S/IC-485SI INSTALLATION IC-485S/IC-485SI 2 INSTALLATION 2-1 INSTALLATION PROCEDURE 1-2 SPECIFICATIONS Before installing the IC-485 you will need a 4wire cable. This cable must go from your location to the place you want to connect to. Installation Procedure: Connector Function Switch Enclosure Weight Dimensions RS-485/422: A 4 terminal block and RJ-1 l* or GND TAB** SWl:DCE,DTE, MONITOR* selection SW2:TxON. RxON SW2:TxRTS, RXXrt SW2:TxRTS. RxON Plastic 60 gm 54x74.5x18.
IC-485S/IC-485SI INSTALLATION INSTALLATION the RS-485 line signals (for IC-485S only). 2-2 SWITCH FUNCTION DESCRIPTION Refer to the location of the SW1 and SW2, please see Figure 1- 1. Position 2: (TxRTS, RxRTS) means the K-485 is in transmitting mode while RTS signal is at high level and it is in receiving mode while RTS signal is at low level.(using in Multidrop mode) IC-485SI: SW 1: Device Mode Selection Position 1: DCE means the IC-485 is set at DCE mode and it must be connected to a DTE device.
IC-485S/IC-485SI OPERATION 3 OPERATION The IC-485S & IC-485SI supports 4 kinds of functions in 6 kinds of configurations. They are 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 IC-485 devices. 1.1 Point-to-Paint/4-Wire Full Duplex( Fig. 3- 1 ) 1.2 Point-to-Pointi2-Wire Half Duplex( Fig. 3-2 ) 2.
IC-485S/IC-485SI OPERATION OPERATION 3-1 POINT-TO-POINT/~-WIRE FULL DUPLEX A B IR+ r/ T+I IC-485S/IC-485SI 3-2 POINT-TO-POINT/2-WIRE HALF DU- / I I Configuration: Configuration: A B 1 DCWJITE 1 DCE/DTE Figure 3- 1 ) TxON,RxON ) TxON,RxON POINT-TO-POINT/4-WIRE FULL DUPLEX Figure 3-2 POINT-TO-POINT/2-WIRE HALF DUPLEX In above Figure if the PC 1 is a DTE device, then the Device A should set the SW1 to DCE. If the PC1 is a DCE device, then the Device A should set the SW1 to DTE.
IC-485S/IC-485SI OPERATION ---.- __ 3-3 MULTIDROP/4-WIRE FULL DUPLEX OPERATION 3-4 MULTIDROP/2-WIRE HALF DUPLEX Bl PC1 => COM1/ COM2 IC-485S/IC-485SI B1 A =>PC2 COM1/ COM2 R+ R- PC1 COM1/ COM2 Ii-485 =>PC2 COM1/ COM2 b2 -I =>PC3 COM1/ COM2 =>PC4 COM1/ COM2 Configuration: Bn Configuration: DCE/DTE ] TxRTS, RxON B TxRTS, R X Note: Bn means any one of the B 1, B2, B3 and SO on. Note: Bn means any one of the B 1, B2, B3 and so on.
IC-485S/IC-485SI OPERATION 3-5 SIMPLEX/ TRANSMIT, RECEIVE ONLY B1 PC1 COM1/ COM2 => IC-485S/IC-485SI OPERATION (for IC-485S only) 3-6 MONITORING Device 2 RS-422lRS-405 Device 1 =>PC2 COM1/ COM2 =>PC3 COM1/ COM2 =>PC4 COM1/ COM2 Configuration: --l R+ IC-48% =>PC COMl/ COM2 Note: R+ and R- signals are converted and linked to the RS-232 port, DB-25 pm 3. R’ + and R’ (T+ and T-) signals are converted and linked to the RS-232 port, DB-25 pm 2.
IC-485S/IC-485SI OTHERS 4 OTHERS 4-1 TERMINAL BLOCK DEFINITION The four screw terminal block has different definition in different operation modes. In the DCE/DTE mode, the terminal #l (+V) and #2(-V) are configured to transmit data, the transmitter; the terminals #3(-V) and #4(+V) are configured to receive data, the receiver.
APPENDIX A RS-232 DCE/DTE DESCRIPTION TROUBLE SHOOTING transmission at the DC 9V Power Adapter is available. . Check that the IC-485 is plugged securely in PC. . Check that the 4-wire cable is connected properly at If failure of printing is still exists upon aforesaid solutions, please contact your dealer for help. 16 User’s Manual Device’s Connector Pin # Cables IC-485 Note: The DTE mode device must be connected to a DCE mode device because the polarity of the communication signals are different.
3. Move the computer away from the receiver. PREVENTING RADIO & TV INTERFERENCE Warning this equipment generates, uses and radiates radio frequency energy and if not installed and used in accordance with the instruction manual may cause interference to radio and television reception.
