ATEN IC485AI User Manual
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ATEN IC485AI User Manual

Rs-232 to rs-422/rs-485 bidirectional converter
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  • Page 2: Fcc Information

    FCC Information FEDERAL COMMUNICATIONS COMMISSION INTERFERENCE STATEMENT: This equipment has been tested and found to comply with the limits for a Class B digital service, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 3 IC485AI User Manual Online Registration You can register your product at our online support center: International http://support.aten.com Online Support International Email Support support@aten.com Online Technical Support http://support.aten.com Support Troubleshooting http://www.aten.com Documentation Software Updates North America Email Support support@aten-usa.com Online Troubleshooting http://www.aten-usa.com/support...
  • Page 4 Telephone Support For telephone support, call this number: International 886-2-8692-6959 China 86-400-810-0-810 Japan 81-3-5615-5811 Korea 82-2-467-6789 North America 1-888-999-ATEN ext 4988 1-949-428-1111 - 4 -...

  • Page 5: Package Contents

    Copyright © 2020 ATEN International Co., Ltd. Manual Part No. PAPE-0194-100 Manual Date: 2020-07-13 ATEN and the ATEN logo are trademarks of ATEN International Co., Ltd. All rights reserved. All other trademarks are the property of their respective owners. - 5 -...
  • Page 6 Overview Although RS-232 serial ports are found on almost every computer, because of their slow transmission speeds, limited range, and limited networking capabilities, they are not an effective solution for industrial strength long distance communications systems. Systems based on the RS-422 and RS-485 standards, on the other hand, are not subject to the RS-232 limitations because they utilize different voltage lines for the data and control signals.

  • Page 7: Top View

     Cable distance of up to 1200 m (4000 ft.)  Compact size Components Top view: 1. Status LEDs  RTS: Lights to indicate that RTS has been pulled high.  TxD: Flashes when data transmission occurs. 2. RS-422 / RS-485 Terminal Block 3.

  • Page 8: Bottom View

    Bottom View: 1. DIP Switch This eight segment DIP Switch, located on the unit’s bottom panel, is used to configure the switch’s operating parameters. - 8 -...

  • Page 9: Dip Switch Configuration

    DIP Switch Configuration The IC-485AI’s settings for Baud Rate, Data Format, and RS-422 / RS-485 Mode are configured by setting the eight segment DIP Switch located on its bottom panel Note: When you change any of the DIP Switch settings, you must reset the device by powering it off, then powering it on again.
  • Page 10  SW 5-6: Data Format These two switch segments configure the bit settings for Start, Data, Parity, and Stop. Data Format (bits) Note: The default is 10 bits (1 Start; 8 Data; 0 Parity; 1 Stop). Unless you have a special reason to change this, we recommend that you leave it as is.

  • Page 11: Operating Modes

    Operating Modes The IC-485AI supports three operating modes: Point-to-Point; Multidrop; and Simplex. Point-to-Point and Multidrop can be configured for Full or Half Duplex. Each of the operating modes is explained below. Point-to-Point A Point-to-Point configuration is one in which two devices, located at two different places are linked for communication by a pair of IC-485AI units.
  • Page 12 2. Point-to-Point 2 Wire Half Duplex  Point-to-Point Half Duplex uses straight through two wire cabling, as shown in the diagram below. DB-25 DB-25 Connect Connect to PC#1's to PC#2's COM port COM port  For both IC-485AI units, set the unit to DCE or DTE depending on what type of device the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
  • Page 13 1. Multidrop Full Duplex  Multidrop Full Duplex uses reverse four wire cabling, to link all the connected IC-485AI units: Secondary 1 Primary COM1/ COM1/ COM2 COM2 Secondary 2 COM1/ COM2 Secondary 31  For all IC-485AI units, set the unit to DCE or DTE depending on what type of device the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
  • Page 14 2. Multidrop Half Duplex  Multidrop Half Duplex uses reverse two wire cabling, to link all the connected IC-485AI units: Secondary 1 Primary COM1/ COM1/ COM2 COM2 Secondary 2 COM1/ COM2 Secondary 3 COM1/ COM2 Secondary 31  For all IC-485AI units, set the unit to DCE or DTE depending on what type of device the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
  • Page 15 Simplex A Simplex configuration is one in which more than two devices are linked for communication using several IC-485AI units in a manner similar to Multidrop. The difference is that in a Simplex configuration, the Primary device can only talk, and the Secondary devices can only listen.

  • Page 16: Installation

    Installation 1. Make sure that all the devices you will be connecting up are powered off. 2. Set each IC-485AI’s configuration switches according to the information provided in the Switch Configuration and Operating Modes sections. 3. Plug the IC-485AI’s DB-25 female connector into the computer’s RS-232C port.
  • Page 17 RS-422 / RS-485 Installation Diagrams Secondary 31 Primary Secondary 1 Secondary 30 4,000' RS-422 Full Duplex Note: When the distance between both ends of the installation is large and/or the transmitted signals are unstable, insert 120Ω terminal resistors between pins 1 and 2 and between pins 3 and 4 on the terminal blocks of the two units at each end of the installation.

  • Page 18: Terminal Block Pin Assignments

    Appendix Terminal Block Pin Assignments DCE/DTE Transmit +V Transmit -V Receive -V Receive +V Circuit Test To test the IC-485AI’s internal circuits, connect a dumb terminal to the unit and do the following: 1. Set the DCE / DTE switch to the opposite of the terminal. 2.
  • Page 19 RS-485 Operation Mode Flow Charts RTS Control Mode Start RTS=0 Send Receive Receive RTS=1 Data Send Complete Data Complete  The IC-485AI operates in RS-485 RTS Control Mode when both SW7 and SW8 are set to OFF.  In this mode, RTS is pulled high when the computer makes a request to send data.
  • Page 20 Auto Send Data Mode Start Busy Receiving Data CTS=1 Idle Receive CTS=0 Data Data Complete to Send Send Data Complete  The IC-485AI operaties in RS-485 Auto Send Data Mode when SW7 is set to OFF, and SW8 is set to ON. ...
  • Page 21 DCE / DTE Connection Description Device’s Connector Pin # Cable IC-485AI 25/25 or 9/25 pin DB-25 DB-25 DB-9 DB-9 DB-25 DB-25 (PG) (DSR) (CD) (SCD) (SCS) (STD) (TC) (SRD) (RC) (SRS) (DTR) (SQD) (RI) (DRS) (XTC) - 21 -...

  • Page 22: Specifications

    Specifications Function Specification Power Consumption DC 9V; 900mW (max.) Data Rate Up to 115.2 Kbps under 1200 m (4000 ft.) Connectors 1 x DB-25 female (RS-232); 1 x 4 Post Terminal Block (RS-422 / RS-485); 1 x Grounding Tab Function Slide Switch DCE / DTE Select Switches DIP Switch...

  • Page 23: Troubleshooting

    Troubleshooting Symptom Action Data Transmission Check that IC-485AI units are securely plugged into the computers’ serial ports. Failure Check that the cables are properly set up and properly connected. Check that SW1 and the DIP Switch are set properly. Insert terminal resistors according to the information given on p.

  • Page 24: Limited Warranty

    What is covered by the Limited Hardware Warranty ATEN will provide a repair service, without charge, during the Warranty Period. If a product is detective, ATEN will, at its discretion, have the option to (1) repair said product with new or...

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