Therefore the longer the cable length is the more the termination resistor decreases signal amplitude.
RS232 is an interface to connect one DTE, data terminal equipment to one DCE, data communication equipment at a maximum speed of 20 kbps with a maximum cable length of 50 feet. That is why RS485 standard [[visit the next internet site](https://www.cap-rs485.xyz/2020/10/cac-ac-iem-chung-pho-quat-ve-chuan-rs485.html "visit the next internet site")] is currently a widely used communication interface in data acquisition and control applications where multiple nodes communicate with each other.
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