What is a signal isolator

A signal isolator is a signal isolation device that converts input single or dual current or voltage signals into output isolated single or dual linear current or voltage signals, and improves the electrical isolation performance between input, output, and power sources. Below, the editor will introduce to you "What is a signal isolator? The difference between active and passive signal isolators"

1. What is a signal isolator

Signal isolators are an important component of industrial control systems. Signal isolators are electronic devices that use the principles of photoelectric isolation or magnetoelectric isolation to isolate and convert input signals before outputting them. The signal isolator adopts advanced digital technology and has excellent performance in suppressing high and low frequency interference signals

2. The difference between active and passive signal isolators

The active isolator circuit includes a power supply part, an input part, and an output part. The signal is processed by the input circuit to become a certain digital quantity or electromagnetic wave, and then isolated without components to achieve electrical isolation. The isolated digital quantity or electromagnetic wave is transformed into an analog quantity through the output circuit. It can isolate various input signals, which can be voltage, current, frequency, and the size of the signal can also be freely selected. As long as the input circuit can process the signal, it can be input and isolated.

The passive isolator circuit includes an input part and an output part. The signal is processed by the input circuit and becomes an electromagnetic wave, with a certain voltage drop. A passive isolator can isolate a 0-20ma DC current signal. The multi-channel signal isolation amplifier, isolation amplifier IC, and isolation transmitter integrate the multi-channel IBF module into a single card rail product (standard DIN35 card rail installation) based on the original foundation. This saves costs and reduces the usage space for on-site multi-channel analog signal isolation converter users, and enables more reasonable assembly of industrial control automation products, enabling products to better achieve modern international standards, small size, and low cost, High performance, high-quality modernization policy.