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The main function is converting RS232 singal to RS422 or RS485 signal!! The applications are :
1. When the controller is used RS232 interface, but the equipment you need to controlled it RS422 or RS485 interface, you can use IC485S/SI/SN/AI to do the signal conversion
2. Basically, the effective data transmitted distance of RS232 is 15 meters, and the effective data transmitted distance of RS422/RS485 is 1200 meters. When you need to access to a RS232 equipment, but the distance is more than 15 meters that RS232 signal cannot be transmitted, you can use IC485S/SI/SN/AI to convert the RS232 signal to RS422 or RS485 signal for extending the distance.
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