Shanghai Chenzhu Instrument CO., LTD.
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What is a Signal Isolator?

Definition of Signal Isolator

A signal isolator, also known as an isolator, signal converter or signal conditioner, is an important component of industrial control systems. A signal isolator is an electronic device that uses optoelectronic isolation or magnetic isolation principles to isolate and convert input signals to output signals. With advanced digital technology, signal isolators have superior performance in suppressing high and low frequency interference signals. They can be reliably applied even in high-power variable frequency control systems. In addition, these isolators feature advanced technologies such as digital tuning, no zero & full potentiometer, automatic dynamic zero calibration, and temperature drift automatic compensation, ensuring scientific guarantees for product stability and reliability.

Active Signal Isolator

An active signal isolator is a hybrid integrated circuit that isolates and converts analog voltage or current signals from sensors to a match of accuracy and linearity. This product is mainly used for analog signal input and output control in industrial control systems. The system outputs signals through DSP and PLC DA conversion to display and control other adjustable outputs of the system, as well as monitor on-site working voltage, current, various operating parameters, and add standard signal interfaces externally. This standard complies with flame-retardant packaging and occupies a small PCB board area. It can be parallel installed in the instrument to monitor, isolate, and convert multiple signal paths. Compared with optoelectronic isolation products, it has better accuracy, linearity, and temperature drift characteristics. It can achieve zero point, gain, and full scale adjustment-free, making it convenient for on-site use, and enhancing reliability and stability.

Passive Signal Isolator

A passive signal isolator does not require an external power source. It obtains a small amount of energy from the input signal to achieve signal isolation. It can be used in conjunction with various industrial sensors and field instruments to retrieve parameter signals, isolate transmitter transmissions, and meet the user's local monitoring and remote data needs.

To solve the mutual interference caused by grounding among various instrument equipment, isolators are commonly used. The function of a signal isolator is to completely isolate the connections between instrument equipment on the electric level, meaning that there is no common "ground" between the input and output, so that signal transmission is not affected.

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