FTA-T-02  | 数字量输入模块  |   R7247C1001  |  FC-IOCHAS-0002R

型号：FTA-T-02

类别: 数字量输入模块

主频:40 MHZ

内存:2 MB

存储空间:2 MB

通信接口:RS-485

工作温度:-20°C至 +60°C

外壳防护等级:IP65

FTA-T-02数字量输入模块的滤波电路主要作用是滤除由输入端引入的干扰噪声，以及消除因外接输入触点动作时产生的抖动导致的不良影响。滤波电路能够只允许一定频率范围内的信号成分正常通过，而阻止另一部分频率成分通过。

在实际应用中，如果输入信号存在干扰或噪音，可以通过调整输入滤波时间来滤除这些干扰，从而避免误动作。滤波电路的时间常数决定了输入滤波时间的长短，对于某些输入模块，输入延迟时间可以调整。

此外，需要注意的是，FTA-T-02数字量滤波是对电压信号的延时滤波，相当于一个低通滤波器，只能滤除高频的干扰脉冲，不能用于滤除低频干扰信号。因此，在设计滤波电路时，需要根据实际的应用场景和信号特性来选择合适的滤波方案。

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.