Analog quantity is relative to digital quantity. It refers to the quantity that the variable changes continuously within a certain range, that is, it can take any value (within the value range) within a certain range (definition domain). Analog quantity is a simulation of actual quantity and changes continuously.
In the industrial production process, many measured parameters, such as temperature, flow, liquid level, speed, etc., are analog quantities. The data processed by the microcontroller can only be digital quantities, so before the data enters the microcontroller, the analog quantities must be converted into digital quantities (that is, A/D conversion), then the analog quantity acquisition module is needed.
The analog acquisition module is an intelligent A/D conversion module used to collect 0-5V/0-10 voltage signals and 4-20mA current signals. The main principle is to collect the input voltage or current signal and connect it to the host PC through the 485 communication interface for transmission. The communication protocol adopts the standard industrial communication MODBUS RTU protocol.
Analog acquisition modules can be used in many fields, such as building automation, environmental monitoring, factory automation, and intelligent transportation. Specific application scenarios include traffic light monitoring, carbon dioxide concentration monitoring, oxygen concentration monitoring, smoke concentration monitoring, and exhaust fan control.
Zongheng Intelligent Control Analog Acquisition Module Z-A0800 is an 8-channel voltage/current optional analog input module. It adopts industrial-grade design. The RS485 interface photoelectric isolation and power isolation technology can effectively suppress interference, and anti-interference is added to all interfaces. Lightning protection circuit ensures the stability of the product during use. It supports the standard MODBUS protocol and can be easily connected to configuration, touch screen, PLC, host computer software, etc. It can also realize remote transmission of data by connecting to DTU/RTU and other equipment.
