FBM227 P0927AC Foxboro controller module

Description

In addition to the general IO mentioned above, there are also special IO modules such as thermal resistors, thermocouples, pulses, etc. Determine the module specifications and quantity based on the number of I/O points. I/O modules can be many or few, but their maximum number is limited by the basic configuration capabilities that the CPU can manage, that is, by the maximum number of backplane or rack slots.

The power module PLC power supply is used to provide working power for the integrated circuits of each PLC module. At the same time, some also provide 24V working power supply for the input circuit. The types of power input include: AC power supply (220VAC or 110VAC), DC power supply (commonly used as 24VDC).

Bottom Plate or Rack Most modular PLCs use a bottom plate or rack, which is used to electrically connect various modules and enable the CPU to access all modules on the bottom plate. Mechanically, the connection between each module is achieved, making each module form a whole.

Other Equipment of PLC System Programming Equipment: The programmer is an indispensable device for PLC development and application, monitoring operation, inspection and maintenance. It is used for programming, setting the system, monitoring the working status of the PLC and the system controlled by the PLC, but it does not directly participate in on-site control operation. Small programmer PLCs generally have handheld programmers, and currently, computers (running programming software) generally act as programmers. That is the upper computer of our system.

Human machine interface: The simplest human-machine interface is indicator lights and buttons. Currently, integrated operator terminals with LCD screens (or touch screens) are increasingly widely used, and computers (running configuration software) are widely used as human-machine interfaces. The communication networking of PLC relies on advanced industrial network technology to quickly and effectively collect and transmit production and management data. Therefore, the importance of networks in automation system integration engineering is becoming increasingly significant, and some even propose the viewpoint that “networks are controllers”.

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