RF Admittance Level Switch is a level measurement device based on radio frequency (RF) capacitive technology to detect the presence or absence of materials in containers or their horizontal position. In the field of industrial automation and process control, this type of switch is often used for level monitoring of a wide range of solids, liquids and powders.
The importance of the isolation module in the RF admittance level switching system is reflected in the following aspects:
Galvanic isolation:
In complex industrial environments, in order to prevent the influence of electrical interference, ground circulation, and lightning strikes from different grounding systems on the measurement accuracy, the isolation module ensures that the signal is transmitted without power fluctuations and noise.
It provides a safety barrier to protect the control system from high voltage, high current shocks, and avoid safety hazards caused by grounding problems.
Signal Conversion & Enhancement:
The isolation module can effectively isolate the field side (such as the low voltage or MA signal output by the sensor) from the control room side (such as PLC, DCS or other controllers), and complete the signal conversion to ensure the stability and accuracy of the signal.
Anti-common-mode interference capability:
The RF admittance switch may be subject to common mode interference in the electromagnetic environment when working, and the isolation module is electrically isolated by optocoupler or magnetic coupling, which greatly enhances the anti-interference performance of the system.
Therefore, in the design of RF admittance level switch systems, the correct selection and configuration of isolation modules is one of the key measures to improve measurement reliability, ensure the stable operation of the system and comply with safety standards.