EMERSON 12P3162X162 SLS 1508 sensor
1. CPU module
CPU module is mainly composed of microprocessor (CPU chip) and memory. In the PLC control system, the factory CPU module is equivalent to the human brain. It continuously collects input signals, executes user programs, and refreshes the output of the system; Memory is used to store programs and data.
2. I/O module
Input module and output module are referred to as I/O module. They are the eyes, ears, hands and feet of the system and the 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 switch, digital dial switch, limit switch, proximity switch, photoelectric switch, pressure relay, etc; The analog input module is used to receive continuously changing analog current and voltage signals provided by potentiometers, tachogenerators and various transmitters.
The switch output module is used to control the output devices such as contactor, solenoid valve, electromagnet, indicator light, digital display device and alarm device, while the analog output module is used to control the actuator such as regulating valve and frequency converter.
The working voltage of CPU module is generally 5V, while the input/output signal voltage of PLC is generally higher, such as DC 24V and AC 220V. The spike voltage and interference noise introduced from the outside may damage the components in the CPU module or make the PLC unable to work properly. In the I/O module, optical coupler, photoelectric thyristor, small relay and other devices are used to isolate the internal circuit and external I/O circuit of PLC. In addition to transmitting signals, I/O modules also have level conversion and isolation functions.
3. Programmer
Programmers use it to generate user programs and use it to edit, check, modify and monitor the execution of user programs. The hand-held programmer cannot directly input and edit the ladder diagram, but can only input and edit the instruction list program, so it is also called the instruction programmer. It is small and cheap. It is usually used for programming small PLC or on-site debugging and maintenance.
The ladder diagram, instruction list, function block diagram and sequence function diagram program can be directly generated and edited on the computer screen by using the programming software, and the mutual conversion of different programming languages can be realized. After the program is compiled, it can be downloaded to the PLC or uploaded to the computer. The program can be saved or printed, and can also be programmed and transmitted remotely through the network.
4. Power supply
PLC generally uses 220V AC power supply or 24V DC power supply. The internal switch power supply provides DC 5V, ± 12V, 24V and other DC power supplies for each module. Small PLCs can usually provide 24V DC power for input circuits and external electronic sensors (such as proximity switches), and DC power for driving PLC loads is usually provided by users.
1B30035H01 1B30016H06 1C31224G02 1X00097H01 1D54581G03
1C31227G01 1C31203G01 1C31166G01 1X00102H01 1D54581G04
1C31169G01 1C31204G01 1C31227G02 1X00107H01 1D54582G01
1C31234G01 1C31205G01 1C31232G03 1X00126H02 1D54582G02
1C31169G02 1C31206G01 1C31233G01 1X00133H01 1D54582G03
1C31122G01 1C31107G01 1C31147G01 1X00161H01 1D54582G05
1C31125G02 1C31110G02 1C31147G02 1X00163H01 1C31192G01
1C31224G01 1C31113G01 1D42128G01 1X00163H02 1D54582G06
1C31116G04 1C31113G02 1D54416G01 1X00163H03 1C31166G02
1C31150G02 1C31113G03 1D54458G01 1X00163H04 1X00024H03
1C31132G01 1C31113G04 1D54471G02 1X00185H01 1X00093G04
1C31129G03 1C31113G05 1D54471G03 1X00377H01 1X00093G05
3A99158G01 1C31113G06 1D54540G01 1X00415H01 1X00093G06
1X00024H01 1C31116G02 1D54544G01-8 1X00416H01 1X00093G07
3A99132G02 1C31116G03 1D54557G03 1X00416H02 1X00093H08
ST24B3 1C31161G02 1D54557G07 1X00416H03 1X00093H09
5A26391H24 1C31164G02 1D54557G10 1X00416H04 1X00093G10
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