Analog quantity is a common signal point in the industrial control industry. Its function is to convert the value of physical quantity into an electrical signal. Analog quantity refers to the quantity of a variable that changes continuously within a certain range, that is, it can take any value (within the value range) within a certain range (definition domain).
Most of our common sensor signals such as temperature, humidity, pressure, and flow are analog signals, and transmitter signals are generally analog signals. In industrial sites, it is often necessary to collect these analog signals for wireless long-distance transmission.
Analog output is basically used to control execution equipment, such as controlling the opening of valves, controlling the speed of frequency converters, etc. In industrial production, especially chemical production, many regulating valves are often used. We need to control the opening of the valve according to the speed of the pipeline fluid or other parameters, which requires the use of analog output for control.
How to realize wireless long-distance transmission of analog quantities
The industrial site environment is complex, and the distance between the sensor and the PLC is often long. If the cable is laid, the signal is easily interfered, causing electromagnetic compatibility EMC problems, and even burning the equipment, causing serious losses. In this case, a wireless analog transmission module is needed to wirelessly transmit the analog signal generated by the sensor to the PLC.
Zongheng Intelligent Control’s industrial-grade wireless analog transmission module uses the operator’s network as the basis for wireless transmission of analog quantities. It provides 4 channels of 0-10V/4~20mA analog input and 4 channels of 0-10V/4~20mA analog input. Output, 1-channel RS485 transparent transmission, supports analog acquisition control, and is suitable for automation and information systems in various industries.
This module is aimed at industrial applications. Its RS485 communication interface adopts a photoelectric isolation design to avoid the impact of industrial field signals on the communication interface. It has good compatibility and stability and supports online communication with multiple devices on the same bus.
This module supports the standard Modbus RTU/TCP communication protocol and common function codes. During use, customers can easily integrate it with configuration (SCADA) software and PLC equipment and systems that support the Modbus RTU/TCP protocol. The operation is very simple and flexible. , efficient.