1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board

Brand ABB height 20 mm rated current 70mA
Protection level adapted to motor power Applicable site Material code
IP45 28KW Power industry HIEE401782R0001
Part No. 1MRK002246-BD Applicable pipe whether imported is 1.6kg can be sold nationwide

1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board

2. Classification of PLC

There are many kinds of PLC products, and their specifications and performance are also different. For PLCS, PHARPS32000000 is usually roughly classified according to the difference in its structural form, the difference in its function and the number of I/O points.

2.1. Classification by structural form

According to the structure of PLC, PLC can be divided into two categories: integral and modular.

(1) Integral PLC

Integrated PLC is the power supply, PHARPS32000000 CPU, I/O interface and other components are centralized in a chassis, as shown in the figure. It has the characteristics of compact structure, small size and low price. Small PLC generally adopts this monolithic structure. Integral PLC by different I/O points of the basic unit (also known as the host) and expansion unit, the basic unit has a CPU, I/O interface, and I/O expansion unit connected to the expansion port and with the programmer or EPROM writer interface; There is only I/O and power supply in the expansion unit, but no CPU. The basic unit and the expansion unit are generally connected by flat cables. Integral PLC can also be equipped with special functional units, such as analog units, position control units, etc., so that its functions can be expanded.

 

(2) Modular PLC

PHARPS32000000 modular PLC The components of the PLC are made into several separate modules, such as CPU module, I/O module, power module (some included in the CPU module) and various functional modules. Modular PLC is composed of a frame or substrate and various modules, and the module is mounted on the socket of the frame or substrate, as shown in the figure. This modular PLC is characterized by flexible configuration, can be selected according to the needs of different scale of the system, and convenient assembly, easy to expand and maintenance. Large and medium-sized PLC generally adopt modular structure.

 

There are also some PLC integrated and modular characteristics combined to form the so-called stacked PLC. The CPU, power supply, and I/O interfaces of stacked PLC are also independent modules, but they are connected by cables, and each module can be stacked layer by layer. In this way, not only can the system be flexibly configured, but also it can be made small.

2.2. Classification by function

According to the different functions of PLC, PLC can be divided into low-grade, mid-grade and high-grade three categories.

(1) Low-grade PLC

PHARPS32000000 low-grade PLC with logic operation, timing, counting, shifting and self-diagnosis, monitoring and other basic functions, but also a small amount of analog input/output, arithmetic operations, data transmission and comparison and communication and other functions, mainly used for logic control, sequence control or a small amount of analog control stand-alone control system.

(2) Mid-range PLC

In addition to the functions of low-grade PLC, PHARPS32000000 also has strong analog input/output, arithmetic operations, data transmission and comparison, number system conversion, remote I/O, subroutine and communication networking functions; Some can also add interrupt control, PID control and other functions, suitable for complex control systems.

(3) high-grade PLC

In addition to the functions of mid-range PLC, high-grade PLC also adds symbolic arithmetic operations, matrix operations, bit logic operations, square root operations and other special functional functions, tabulation and table transmission functions. High-grade PLC has a stronger communication networking function, can be used for large-scale process control or constitute a distributed network control system, and then achieve factory automation.

1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board

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