Description

ABB PPD115A102 3BHE017628R0102

1. CPU module

The CPU module is mainly composed of a microprocessor (CPU chip) and memory. In the PLC control system, the CPU module is equivalent to the human brain and heart, it constantly collects the input signal, executes the user program, and refreshes the output of the system; Memory is used to store programs and data. The S7-300/400 refers to the CPU module as the CPU for short.

2. Signal module

The Input module and Output module are referred to as I/O modules, the switching input and switching output modules are referred to as DI modules and DO modules, and the analog input and analog output modules are referred to as AI modules and AO modules, which are collectively referred to as signal modules. The signal module is the eyes, ears, hands, and feet of the system, and is the bridge connecting the external field devices and the CPU module.

The input module is used to receive and collect the input signal, and the switch input module is used to receive the switch input signal from the button, select switch, digital dip switch, limit switch, proximity switch, photoelectric switch, pressure relay, etc. The analog input module is used to receive the continuously changing analog current and voltage signals provided by potentiometer, tonometer generator and various transmitters, or directly receive the temperature signals provided by thermal resistance and thermocouple.

The switching output module is used to control the output equipment such as contactor, solenoid valve, electromagnet, indicator light, digital display device and alarm device, and the analog output module is used to control the electric regulating valve, frequency converter and other actuators.

The operating voltage inside the CPU module is generally DC5V, while the external input/output signal voltage of the PLC is generally higher, such as DC24V or AC220V. Peak voltage and interference noise introduced from the outside can damage components in the CPU module or make the PLC not work properly. In the signal module, devices such as optical couplers and small relays isolate the internal circuit of the PLC from the external input and output circuits. In addition to transmitting signals, the signal module also has the function of level conversion and isolation.

3. Function module

In order to enhance the function of PLC, expand its application field, reduce the burden of CPU, PLC manufacturers have developed a variety of functional modules. They are mainly used to complete some control tasks that require high real-time and storage capacity, such as high-speed counting, position control and closed-loop control.

4. Interface module

The CPU modules are located in the central rack. If a rack cannot accommodate all the modules, add one or more extension racks. The interface module (IM for short) is used to communicate between the central rack and the extension rack.

5. Communication processor

Communication processor (referred to as CP) is used for communication between PLC, PLC and remote I/O, PLC and computer and other intelligent devices, can be S7-300/400 access to various communication networks, CP is also used to achieve point-to-point communication and so on. The CPU module integrates MPI communication interface, and some CPU modules also integrate other communication interfaces.

6. Power module

The power module (PS for short) is used to convert the input AC220V power supply or DC24V voltage into stable DC24V and DC5V voltage for the load of other PLC modules and output modules.

Main brands include: ABB, Bailey, GE, FOXBORO, Invensys TRICONEX, Bentley BENTLY, A-B Rockwell, EMERSON EMERSON, B&R, MOTOROLA, FUANC, REXROTH, KUKA, HONEYWELL, NI, DEIF, Yokogawa, WOODWARD WOODWARD, Ryan, SCHNEIDER SCHNEIDER, Yaskawa, MOOG, EPRO, PROSOFT and other major brands

One year warranty, special discount after sale

The company focuses on DCS, PLC, robot, large servo four systems

The main products are all kinds of module/card, controller, touch screen, servo drive

The company's advantages: the supply of imported original products, professional production of accessories

Fast delivery time, complete supply, The seller has more than $1526000 worth of industrial control products inventory

We Can transport to the world！！！

① 24-hour email reply (12 hours); 

② For shipment to countries outside Asia, please contact the seller.

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