For more information about Siemens S7-200PLC, check: Siemens 200 series PLC learning course outline (course preparation)
1. What is the CPU of Siemens 200PLC?
As shown in Figure 1-1 below, the S7-200 PLC CUP integrates a microprocessor, an integrated power supply, certain digital or analog I/O, and certain communication interfaces into a black box package to form a A powerful PLC is the CPU module of the PLC.
Figure 1-1 CPU module of Siemens 200PLC
2. Technical index of CPU of S7-200
In order to improve the applicability of PLC, Siemens provides different CPU types of S7-200PLC, which differ in memory size, data storage area size, input and output scale, and other functions, as shown in Figure 2-1. index:
Figure 2-1 200PLC technical indicators
3. S7-200 PLC expansion module
The expansion module of Siemens 200PLC is used to supplement the functions of the CPU module. Because the CPU module has limited functions due to its small size, the expansion module is to increase the scale of the PLC control system. However, the expansion module cannot exist independently and must rely on the CPU module to use it. , S7-200 PLC provides various types of expansion modules to meet different control requirements, such as digital input and output modules to increase the number of input and output, and positioning modules to perform position control, etc., as shown in Figure 3-1. Summary of modules.
Figure 3-1 The expansion module of Siemens 200PLC
Appendix: Technical Parameters of Digital Expansion Modules
The order number and technical parameters of the digital expansion module are shown in the following four figures:
