4-20mA optical fiber transmission is actually an AD that converts analog signals into digital signals, and the digital signals are transmitted through optical fibers, such as OPC420A optical fiber converter developed by Hunan Yinhe Electric Co., Ltd. ..
At the other end, after receiving the digital signal from the optical fiber, it is converted into analog output by DA. For example, the OPC420B optical fiber converter developed by Hunan Yinhe Electric Co., Ltd. ..
The 4-20mA optical fiber converter can extend the analog transmission distance, and the optical fiber transmission can effectively suppress the electromagnetic interference in the transmission process and realize the long-distance interference-free transmission of analog signals.