PR6424/000-030 CON021

产品标题: PR6424/000-030 CON021 轴位移传感器与前置器配套

型号： PR6424/000-030 CON021

品牌：艾默生

详情资料

1.CPU模块

CPU模块主要由微处理器(CPU芯片)和存储器组成。在PLC控制系统中，工厂CPU模块相当于人脑。它不断地收集输入信号，执行用户程序，并刷新系统的输出；内存用于存储程序和数据。

2.输入输出模块

输入模块和输出模块简称为I/O模块。它们是系统的眼睛、耳朵、手和脚，是外部现场设备和CPU模块之间的桥梁。

输入模块用于接收和采集输入信号，开关输入模块用于接收从按钮；来自选择开关、数字拨盘开关、限位开关、接近开关、光电开关、压力继电器等的开关输入信号；模拟输入模块用于接收电位器、测速发电机和变送器提供的不断变化的模拟电流和电压信号。

开关量输出模块用于控制接触器、电磁阀、电磁铁、指示灯、数显装置、报警装置等输出设备，模拟量输出模块用于控制调节阀、变频器等执行机构。

CPU模块的工作电压一般为5V，而PLC的输入/输出信号电压一般较高，如DC 24V，AC 220V。从外部引入的尖峰电压和干扰噪声可能会损坏CPU模块中的组件或使PLC无法正常工作。在I/O模块中，采用光耦、光电晶闸管、小继电器等器件隔离PLC内部电路和外部I/O电路。I/O模块除了传输信号外，还具有电平转换和隔离的功能。

英文资料

1. CPU module

The CPU module mainly consists of a microprocessor (CPU chip) and memory. In a PLC control system, the factory CPU module is equivalent to a human brain. It continuously collects input signals, executes user programs, and refreshes the system's output; Memory is used to Stored procedure and data.

2. Input output module

The input module and output module are abbreviated as I/O modules. They are the eyes, ears, hands, and feet of the system, serving as a bridge between external field devices and CPU modules.

The input module is used to receive and collect input signals, and the switch input module is used to receive slave buttons; Switch input signals from selector switches, digital dial switches, limit switches, proximity switches, photoelectric switches, pressure relays, etc; The analog input module is used to receive the constantly changing analog current and voltage signals provided by the Potentiometer, tachogenerator and transmitter.

The switch output module is used to control output devices such as contactors, solenoid valves, electromagnets, indicator lights, digital display devices, alarm devices, etc., while the analog output module is used to control actuator mechanisms such as regulating valves and frequency converters.

The working voltage of the CPU module is generally 5V, while the input/output signal voltage of the PLC is generally higher, such as DC 24V and AC 220V. The spike voltage and interference noise introduced from outside may damage the components in the CPU module or prevent the PLC from working properly. In the I/O module, devices such as optocouplers, optoelectronic thyristors, and small relays are used to isolate the internal and external I/O circuits of the PLC. In addition to transmitting signals, I/O modules also have functions of level conversion and isolation.

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