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数字输入： DI651模块是用于读取数字输入信号的设备。它可以接收来自传感器、开关、按钮等外部设备的数字信号。
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信号类型： 这种模块通常可以处理不同类型的数字信号，例如开关信号、脉冲信号、状态信号等。
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通道数量： DI651模块可能具有多个输入通道，可以同时监测多个数字信号。
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电源供应： 这种模块通常需要外部电源供应以确保正常运行。
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通信接口： DI651模块通常具有与控制系统通信的接口，可能是数字或模拟信号。
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安装： 它通常安装在控制系统的机架或机箱中，与其他自动化设备集成。
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工业标准： 这种模块通常符合工业标准，以确保其稳定性和可靠性。
Digital input: The DI651 module is a device used to read digital input signals. It can receive digital signals from external devices such as sensors, switches, buttons, etc.
Signal type: This module can usually handle different types of digital signals, such as switch signals, pulse signals, status signals, etc.
Number of channels: The DI651 module may have multiple input channels and can simultaneously monitor multiple digital signals.
Power supply: This type of module typically requires external power supply to ensure normal operation.
Communication interface: DI651 modules typically have interfaces for communication with control systems, which may be digital or analog signals.
Installation: It is usually installed in the rack or chassis of the control system and integrated with other automation equipment.
Industry standards: This type of module typically meets industry standards to ensure its stability and reliability.
