Instruction/ maintenance manual of the product RS-422 ATEN Technology
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FCC Information This equipme nt has been tes ted and found to comply with the limits for a Class B d igital d evice, purs uant to Part 1 5 of the FCC Ru les. These lim its are designed t o provide rea sonable pr otection aga inst harmful interfer ence in a residenti al installa tion.
- 3 - ic485ai User Manu al Online Registration T elephone Sup port T echnical Support For international online technical support – i ncluding troubleshooting, documentation, and software updates: http://support. aten.com For North American technical support: International h ttp://support .
- 4 - Pa c k a g e C o n t e n t s The RS232 / RS485 Interface Converter package contains the following items: 1 IC485AI Bidirectional Isolate d Converter 1 Power Adapter 1 User Manual Check to make sure t hat all the components are present and that nothing got damaged in shipping.
- 5 - Overview Although RS-232 serial ports are found on almost every computer , becau se of their slow transmission speeds, limited range, and limi ted networking capabilities, they are not an effective solution for industrial strength long distance communications systems.
- 6 - Cable distance of up to 1200 m (4000 ft.) Compact size Components T op view: 1. S tatus LEDs RTS: Lights to indicate that R TS has been pulled high. TxD: Flashes when data transmission occurs. 2. RS-422 / RS-485 T erminal Block 3.
- 7 - Bot tom V iew: 1. DIP Switch This eight segment DIP Switch, located on the unit’s bottom panel, is used to configure the switch’s operating p arameters.
- 8 - DIP Switch Configuration The IC-485AI’s settings for Baud Rate, Data Format, and RS-422 / RS-485 Mode are configured b y setting the eight se gment DIP Switch located on its bottom panel Note: When you change any of the DIP Switch settings, you must reset the device by pow ering it off, then powering it on again.
- 9 - SW 5-6: Data Format These two switch segments configure the bit settings for S tart, Data, Parity , and S top. 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.
- 10 - Operating Modes The IC-485AI supports three operating modes: Point-to-Point; Multidrop; and Simplex. Point-to-Point and Mu ltidrop can be configured for Fu ll or Half Dupl e x.
- 11 - 2. Point-to-Point 2 Wire Half Duplex Point-to-Point Half Duplex uses straight through two wire cabling, as shown in the diagra m below . For both IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 12 - 1. Multidrop Full Duplex Multidrop Full Duplex uses reverse fo ur wire cabling, to link all the connected IC-485AI units: For all IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 13 - 2. Multidrop Half Duplex Multidrop Half Duplex uses reverse two w ire cabling, to link all the connected IC-485AI units: For all IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 14 - Simplex A Simplex configuration is one in which more than two devices are linked for commu nication using several IC-485AI 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.
- 15 - Installation 1. Make sure that all the devices you will be connecting up are powered of f. 2. Set each IC-485AI’s configuration switches accordin g to the information provid ed in the Switch Configuration and Operating Modes sections. 3. Plug the IC-485AI’s DB-25 female connector into the computer’s RS-232C por t.
- 16 - RS-422 / RS-485 Inst alla tion Diagr ams RS-422 Full Duplex Note: When the distan ce between both ends of the installation is large and/o r the transmitted si gnals are unstable, insert 120 Ω terminal resistors between pins 1 and 2 an d between pins 3 and 4 on the terminal blo cks of the two units at each en d of the instal lation.
- 17 - Appendix T erminal Block Pin As signments Circuit T est T o 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. Set all DIP Sw itch segments to ON .
- 18 - RS-485 Oper a tion Mode Flow Char ts RTS Co n tr o l M o de The IC-485AI operates in RS-4 85 RTS Control Mode when both SW7 and SW8 are set to OFF .
- 19 - Au t o S en d D at a M o d e The IC-485AI operaties in RS-485 Auto Send Data Mode when SW7 is set to OFF , and SW8 is set to ON . In this mode, the status of t he bus li ne is auto-detected in order to prevent more than one signal on the line.
- 20 - DCE / DTE Connection Description D CE DTE DCE DTE DB- 9 DB-9 DB-25 DB-25 1 1 (PG) 1 1 2 3 3 2 2 3 3 2 2 .
- 21 - Specifica tions Function Specification Power Consumption DC 9V ; 900mW (max.) Data Rate Up to 1 15.2 Kbps under 1200 m (4000 ft.) Connectors 1 x DB-25 female (RS-232); 1 x 4 Post T erminal Bloc.
- 22 - T roubleshooting Limited W arr anty IN NO EVENT SHALL THE DIRECT V E NDOR’S LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM THE DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQ UENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, DISK OR ITS DOCUMENTATION.
An important point after buying a device ATEN Technology RS-422 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought ATEN Technology RS-422 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data ATEN Technology RS-422 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ATEN Technology RS-422 you will learn all the available features of the product, as well as information on its operation. The information that you get ATEN Technology RS-422 will certainly help you make a decision on the purchase.
If you already are a holder of ATEN Technology RS-422, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime ATEN Technology RS-422.
However, one of the most important roles played by the user manual is to help in solving problems with ATEN Technology RS-422. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ATEN Technology RS-422 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
