WESDAC-D20-A 输入输出模块 可以提供连续变化的电压

WESDAC-D20-A 输入/输出模块，简称I/O模块，是计算机系统中负责与外部设备进行通信的重要组件。在可编程控制器（如PLC）中，是联系外部现场和CPU模块的桥梁。具体来说，输入模块主要负责接收和采集来自外部设备的输入信号。这些信号可以来自各种开关量输入设备，如按钮、选择开关、数字拔码开关、限位开关、接近开关、光电开关、压力继电器等。此外，输入模块还能接收由电位器、热电偶、测速发电机、各种变送器等提供的连续变化的模拟量输入信号。输出模块则负责将处理后的信号输出到外部设备，以驱动或控制这些设备。输出信号可以是数字量，也可以是模拟量，具体取决于输出模块的类型和配置。例如，晶体管输出模块是一种常用的数字量输出模块，它可以提供高速、高频率的输出信号，适用于驱动小型执行机构或指示灯等。而模拟输出模块则可以提供连续变化的电压或电流信号，适用于驱动电机、阀门等需要连续控制的设备。

WESDAC-D20-A

WESDAC-D20-A input/output module, abbreviated as I/O module, is an important component in computer systems responsible for communicating with external devices. In programmable controllers (such as PLCs), they serve as a bridge between external fields and CPU modules. Specifically, the input module is mainly responsible for receiving and collecting input signals from external devices. These signals can come from various switch input devices, such as buttons, selector switches, digital pull-out switches, limit switches, proximity switches, photoelectric switches, pressure relays, etc. In addition, the input module can also receive continuously changing analog input signals provided by potentiometers, thermocouples, tachometers, various transmitters, etc. The output module is responsible for outputting the processed signal to external devices to drive or control these devices. The output signal can be digital or analog, depending on the type and configuration of the output module. For example, a transistor output module is a commonly used digital output module that can provide high-speed and high-frequency output signals, suitable for driving small actuators or indicator lights, etc. The analog output module can provide continuously changing voltage or current signals, suitable for driving devices such as motors and valves that require continuous control.