What is the analog input module?

The plc analog input module is a remote site analog signal acquisition device to the computer, which utilizes RS-485 bus as a data communication lines, providing analog to 485 function, can simultaneously eight analog input to the plc module, and by RS-485 bus transfer to the computer. Thanks to RS-485 interface as a communication interface, which can be a combination of multiple modules analog signal transmission more large ones, and can be dispersed in a 485 line, using the address code to distinguish, can directly access the MODBUS RTU protocol configuration software.
Analog is any value within a certain range of continuous change, with a state is antithetical to the digital representation. Typically used for analog capture and presentation of things, such as voltage and current, or frequency parameters. The analog input module is a possible acquisition of analog (such as voltage, current, thermocouple, RTD, temperature and other values) is transmitted to a computer via a smart module 485. The communication protocol uses MODBUS RTU protocol, and industrial data acquisition to achieve a unified docking program is also very convenient.