FCC Information This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instruction manual, may cause interference to radio communications.
IC-485SN User Manual Online Registration International http://support.aten.com North America http://www.aten-usa.com/product_registration Telephone Support International 886-2-8692-6959 China 86-10-5255-0110 Japan 81-3-5323-7178 Korea 82-2-467-6789 North America ATEN TECH 1-888-999-ATEN ATEN NJ 1-732-356-1703 United Kingdom 44-8448-158923 Technical Support For international online technical support – including troubleshooting, documentation, and software updates: http://support.aten.
Package Contents The IC-485SN package contains the following items: 1 IC-485SN Bidirectional Converter 1 User Manual Check to make sure that all the components are present and that nothing got damaged in shipping. If you encounter a problem, contact your dealer. Read this manual thoroughly and follow the installation and operation procedures carefully to prevent any damage to the unit, and/or any of the devices connected to it.
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.
Switch Configuration RS-232C DB-25 Female Connecter SW1 SW2 Terminal Block Power Jack RJ-11 Phone Jack Connecter The IC-485SN is configured by setting two slide switches.
Explanations of the SW1 and SW2 terns are given in the table below: Term Meaning DCE DCE means Date Communication Equipment; if the IC-485SN is going to be plugged into a DTE device, the IC-485SN must be set to DCE. DTE DTE means Date Terminal Equipment; if the IC485SN is going to be plugged into a DCE device, the IC-485SN must be set to DTE. TxON, RxON This setting is used in Point-to-Point operations, in which the unit is always in Transmitting and Receiving Mode.
Operating Modes The IC-485SN 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-485SN units. There are two configurations: Point-toPoint Full Duplex, and Point-to-Point Half Duplex. 1.
2. Point-to-Point 4 Wire Half Duplex Point-to-Point Half Duplex uses straight through four wire cabling, as shown in the diagram below. DB-25 Connect to PC#1’s Com Port RJ-11 DATA+ DATABUSY+ BUSY- RJ-11 5 5 4 4 DATA+ DATA2 BUSY+ 3 BUSY- 2 3 DB-25 Connect to PC#1’s Com Port For both IC-485SN units, set SW1 to DCE or DTE depending on what type of device the IC-485SN will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
Multidrop A Multidrop configuration is one in which more than two devices are linked for communication using several IC-485SN units. Either a two-to-one RJ-11 adapter or a combination of the terminal block and the RJ-11 socket can be used to connect the IC-485SN units to each other. One of the devices that one of the IC-485SNs connects to is designated as the Master device. All the remaining devices that the rest of the IC-485SNs connect to are designated as Slave devices.
2.
Simplex A Simplex configuration is one in which more than two devices are linked for communication using several IC-485SN units in a manner similar to Multidrop. The difference is that in a Simplex configuration, the Master device can only talk, and the Slave devices can only listen.
Installation 1. Set each IC-485SN's configuration switches according to the information provided in the Switch Configuration and Operating Modes sections. 2. Plug the IC-485SN's DB-25 female connector into the computer's RS-232C port. 3. Connect the IC-485SN units to each other: Use two or four wire twisted pair cable in a reverse or straight through configuration according to the information provided in the Switch Configuration and Operating Modes sections.
Appendix Terminal Block Pin Assignments Pin Assignment 1 Transmit +V 2 Transmit -V 3 Receive -V 4 Receive +V DCE / DTE Connection Table Device’s Connector Pin # DCE DTE DB-9 DB-9 2 3 8 7 4 6 5 3 2 7 8 6 4 5 DCE Cable 25/25 or 9/25 pin DTE DB-25 DB-25 3 2 5 4 20 6 7 2 3 4 5 6 20 7 IC-485ASI Tx Rx Rx Tx RTS CTS CTS RTS DSR DTR DTR DSR - 14 - GND DCE DTE DB-25 DB-25 2 3 4 5 6 20 7 3 2 5 4 20 6 7
SW2 Pin Assignment Schematics TxON, RxON: 1 Tx+ 2 Tx- 3 Rx- 4 Rx+ Tx2 Rx3 RTS CTS DTR DSR TxRTS, RxON: 1 Tx+ DCE TX Tx 2 Tx- DTE RX Rx 3 Rx- 4 Rx+ RTS CTS DTR DSR - 15 -
TxDTR/RTS, RxDSR/ON: 1 DATA + DCE TX 2 DATA - DTE RX DCE DTE RTS CTS 3 BUSY - DTR 4 BUST +- DSR - 16 -
Troubleshooting Symptom Data Transmission Failure Action Check that the IC-485SN units are securely plugged into the computers' serial ports. Check that the cables are properly set up and properly connected. Check that SW1 and SW2 are set properly. Data Loss or Error Check that the Data Rate and Data Format are the same for all devices. Specifications Power Consumption 6.51 mA Data Rate Up to 100 Kbps under 1.2 Km (4000 ft.
Limited Warranty IN NO EVENT SHALL THE DIRECT VENDOR S LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FORM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, DISK, OR ITS DOCUMENTATION. The direct vendor makes no warranty or representation, expressed, implied, or statutory with respect to the contents or use of this documentation, and specially disclaims its quality, performance, merchantability, or fitness for any particular purpose.