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RS-232/RS485 computer connectivity

RS232 is used for many purposes, such as connecting computers to sensors and modems, or for instrument control. RS232 hardware permits communication at distances up to 50 ft. RS232 serial interfaces offer increased functionality, such as high speed baud rates up to 1 Mbps.

RS485 increases the number of devices from 10 to 32 and defines the electrical characteristics necessary to ensure adequate signal voltages under maximum load. With this enhanced multidrop capability, you can create networks of devices connected to a single RS485 serial port. The noise immunity and multidrop capability make RS485 the serial connection of choice in industrial applications requiring many distributed devices networked to a PC or other controller for data collection, HMI, or other operations. RS485 hardware is used for serial communication up to 4000 ft of cable. RS485 serial interfaces offer increased functionality, such as high-speed baud rates up to 3 Mbps.