FTA-T-02 | Digital input module

Model: FTA-T-02

Category: Digital input module

Main frequency :40 MHZ

Memory :2 MB

Storage space :2 MB

Communication interface :RS-485

Operating temperature :-20°C to +60°C

Enclosure protection class :IP65

The filter circuit of FTA-T-02 digital input module is mainly used to filter the interference noise introduced by the input end and eliminate the adverse effects caused by the jitter caused by the action of the external input contact. The filter circuit can only allow the signal components within a certain frequency range to pass normally, and prevent the passage of other frequency components.

In practical applications, if there is interference or noise in the input signal, the interference can be filtered out by adjusting the input filtering time, so as to avoid misoperation. The time constant of the filter circuit determines the length of the input filtering time, and the input delay time can be adjusted for some input modules.

In addition, it should be noted that the FTA-T-02 digital filter is a delay filter of the voltage signal, which is equivalent to a low-pass filter, which can only filter out high-frequency interference pulses, and cannot be used to filter out low-frequency interference signals. Therefore, when designing the filter circuit, it is necessary to choose the appropriate filtering scheme according to the actual application scenario and signal characteristics.