PDD200A101 能够将外部信号电平转换为PLC内部信号电平

Description

PDD200A101 能够将外部信号电平转换为PLC内部信号电平

数字量输入模块的工作原理是将外部的机械触点和电子数字式传感器连接起来，将外部的数字信号转换成PLC内部信号电平。具体来说，PDD200A101 数字量输入模块通过光电隔离和滤波电路，将输入信号转换为PLC内部信号电平，并经背板总线送入到输入映像区。在数字量输入模块中，一般设有RC滤波电路，以防止由于输入触点抖动或外部干扰脉冲引起的错误输入信号。此外，数字量输入模块还具有隔离和功率放大的作用，能够将外部信号电平转换为PLC内部信号电平，同时驱动单相可控硅电力调整器、电磁阀、电源开关等设备。

PDD200A101 数字量输入模块的选择应根据实际需求进行，例如直流16点输入模块、直流32点输入模块、交流16点输入模块和交流8点输入模块等可供选择。在使用数字量输入模块时，需要注意防止输入触点抖动和外部干扰脉冲等问题，以保证数字量输入模块的正常工作。

PDD200A101 能够将外部信号电平转换为PLC内部信号电平

The working principle of the digital input module is to connect the external mechanical contact and the electronic digital sensor to convert the external digital signal into the PLC internal signal level. Specifically, the PDD200A101 digital input module converts the input signal into the PLC internal signal level through the photoelectric isolation and filtering circuit, and sends it to the input image area through the backplane bus. In the digital input module, the RC filter circuit is generally provided to prevent the wrong input signal caused by the input contact jitter or external interference pulse. In addition, the digital input module also has the role of isolation and power amplification, can convert the external signal level to the PLC internal signal level, and drive the single-phase thyristor power regulator, solenoid valve, power switch and other equipment.

PDD200A101 digital input module selection should be based on actual needs, such as DC 16 point input module, DC 32 point input module, AC 16 point input module and AC 8 point input module are available. When using the digital input module, it is necessary to prevent the input contact jitter and external interference pulse, so as to ensure the normal operation of the digital input module.