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RS-232 - RS-485
INTERFACE CONVERTER
S
&
IC-485SI
User’s Manual
@Copyright 1994 International CO., LTD.
Manual par t 7 - E .
06 /9 4
Printed in Taiwan
NO PAP 00 5-2 00
ATEN@
IC-485
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PACKAGE CHECKLIST When you purchase this product, it should contain the following elements: l IC - 4 85 S or IC-485SI Converter x 1 l Power Adapte r 20 0 mA ) x 1 l S - & IC-485SI User’s Manual x 1 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-485S I onl y ) . IC 485 (DC9V,
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FUNCTION OVERVIEW I S - / S - 1 FUNCTION OVERVIEW TABLE OF CONTENTS l-l INTRODUCTION 1 FUNCTION OVERVIE W . 1 S - interface converters for RS-232 and 1 l-l Introductio n . 485. The IC-485SI has built-in isolators for high l-2 Specifications . . 2 voltage protection. With the IC-485 series, 3 2 INSTALLATIO N . ic - 485 s & IC - 48 5SI , it provides Point-to-Point, 1 Installation Procedure . . 3 Multidrop and Simplex operations. Th e IC-485s provides an extra Monitoring function. ......... . 4
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INSTALLATION FUNCTION OVERVIEW 2 INSTALLATION 1-2 SPECIFICATIONS 2-1 INSTALLATION PROCEDURE Before installing the IC-485 you will need a wire cable. This cable must go from your location to Installation Procedure: 1 Before installing the IC-485 to the PC, decide one of the 6 possible configurations suitable for your application. Please check Chapter 3 A 4 terminal block and RJ-1 o r GND OPERATION for correct slide switch settings and phone wires connection, then connec t 485 to the PC. MO
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INSTALLATION INSTALLATION I S 5 - / S I S 5 - / S 5 - the RS-485 line signal s IC - 48 5 S 2-2 SWITCH FUNCTION DESCRIPTION Refer to the location of the SW1 and SW2, please see SW2: Transmitting and Receiving mode selection Figure 1. Position 1 : means the IC-485 is : S 5 - always in transmitting mode and in re- ceiving in Point-to-Point Position 2: means the K-485 is in high level and it is in receiving mode IC-485SI: while RTS signal is at low level.(using in Multidrop mode) Position 3 :
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OPERATION OPE RA TI ON 5 - C S 5 Simplex configuration means that more than two 3 OPERATION devices can be linked all together to communicate The S 5 & IC-485SI supports 4 kinds of through many IC - 48 5 devices. Its configuration is functions in 6 kinds of configurations. They are like the Multidrop’s, but the master device can talk an d the slaver devices can listen only. 4. Mo ni to r Mod e ( Fig. 3- 6 ) Point-to-Point configuration means two devices (f or IC - 485 S on ly ) which locate at
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S - / S 5 - I OPERATION OPERATION 5 - 3-1 POINT-TO-POINT/~- W I RE FULL DU- 3-2 POINT-TO-POINT/2-WIRE HALF DU- PLEX A B / I I A 1 ) B 1 DC E / DTE ) Figure 3-2 POINT-TO-POINT/2-WIRE H- ALF DUPLEX Figure 1 POINT-TO-POINT/4-WIRE FULL a is a DCE device, then the Device A should set the SW1 t o . E The switch setting method for the 9 8 User’s Manual User’s Manual ing the setting rule indicated in this Section. Note: All the SW1 setting in this Chapter are follow- Device B is identical to
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OPERATION IC - 485 S / IC - 48 5 SI OPERATION __ FULL DUPLEX 3-4 HALF DUPLEX Bl 1 B A PC1 => M / / COM2 COM2 2 COM2 Ii-485 b2 M COM2 Bn DCE/DTE ] TxRTS, RxON B TxRTS, R X , SO on . Note: Bn means any one of the B 1, B2, B3 and so on. Figure 3- 3 L X P Figure 3- 4 W - 2 / P O I HALF 10 User’s 11 User’s Manual Manual PL EX DU- MU LT DR IRE DU LE FUL MULTIDROP/4-WIRE and B2, B3 means any one of the B 1 Bn Note: Configuration: Configuration: CO 1/ =>PC4 COM2 CO M1/ =>PC3 -I COM COM 1/ CO
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IC-485S/IC-485SI I S 5 - 5 - OPERATION OPERATION 3-5 SIMPLEX/ TRANSMIT, RECEIVE ONLY (for IC - 48 5 S ) 3-6 MONITORING 1 B RS-422lRS-405 Device 1 / 1 M COM2 COM2 C COM2 COM2 Note: R+ and R- signals are converted and linked to the RS-232 port, DB-25 pm 3. R’ + and R’ - / COM2 (T+ and T-) signals are converted and linked to the RS-232 port, DB-25 pm 2. 1 DCE/DTE 1 TxON, RxON A 1 DCE/DTE ) TxON, RxON Bn A 1 MONI 1 TxRTS, RxON Note: Bn means any one of the B 1, B2, B3 and so on. Note: The RTS must b
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I S / S OTHERS OTHERS 4 OTHERS 4-2 SELF TEST 4-1 TERMINAL BLOCK DEFINITION To test the internal circuit of the interface con- - i d nit io n (+V) and 1. Set SW1 to DCE (if the dumb terminal is a #2(-V) are configured to transmit data, the transmit- ter; the terminals #3(-V) and 2. Set SW2 to 3. Connect one wire from to r IC - 48 5 S and connect another wire from T X -(#2) to terminals #2 negative of receiver the terminal #3 and ##4 4. Set the terminal to full duplex and enter dat
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APPENDIX A RS-232 DESCRIPTION TROUBLE SHOOTING a t the DC 5 - Power Adapter is available. . Check that the IC-485 is . is connected properly a t Note: The DTE mode device must be connecte d communication signals are different. The shadow area is a connection example for a DTE device to a DCE device. 17 16 User’s Manual User’s Manual solutions, please contact your dealer for help. If failure of printing is still exists upon aforesaid of the a DCE mode device because the polarity to Check th
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PREVENTING RADIO & TV INTERFER- 4. Plug the computer into a different outlet so that ENCE computer and receiver and on different branch Warning this equipment generates, uses and radi- 5. Ensure that the mounting screws, attachment ates radio frequency energy and if not installed and connector screws and ground wires are tightly used in accordance with the instruction manual may cause interference to radio and television reception. It has been tested and found to comply with the limits 6. Ensure
