Improving Reliability of Communication in RS-485 Design

Three aspects of RS 485 application, which affect the reliability of communication of data system are analyzed and discussed. In network configuration, it presents the optimal configuration for the bus of RS 485, the better rule for derivative line and the choice for termination. In hardware design, it presents three parts of driver's peripheral circuit. In control software design, it presents a method of using 75176's DE line to control the driver.