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Siemens PLC Model Selection _ Siemens PLC Model Description
Siemens PLC Model Selection
Firstly, it is necessary to adhere to the process requirements:
Confirm the input and output points, i.e., DI, DO, AI, AO.
Confirm the need for external communication interfaces, such as MPI, DP, Ethernet, etc.
Decide on the series to choose, such as S7-200, S7-300, S7-400
Note: Storage capacity is determined. Be aware that when the system has analog signals present or requires extensive data processing, a larger storage capacity should be selected.
Siemens PLC Model Descriptions
Siemens product order number naming rules:
6ES7 221-0BA23-0A0 as an example.
6ES - Automation System Series
7------7: S7 Series, 5: S5 Series
2------2: Series 200, 3: Series 300, 4: Series 400
2------1: CPU, 2: DI/DO, 3: AI/AO, 4: Communication Module, 5: Function Module
1: Input, 2: Output, 3: Input/Output (for analog signals)
1BF - Input/output voltage levels, types, points, etc., there are many of these; it's better to check the samples.
2
So the above is the 200 switch input expansion module.
Complete Order Number: 6ES7 321-1BH01-0xA0
6ES7: S7 Series PLC Module
3: Series 300
2: Digital Quantity (1 for CPU, 3 for Analog, 4 for Communication, 5 for Function)
1: Input (2 for output, 3 for input/output)
Function Level (the higher the number, the stronger the function)
Transistor (H for relay, F for AC, K for general-purpose if it's analog, P for temperature signal)
H: 4:00 PM (L = 8:00 PM, F = 4:00 AM, D = 2:00 AM, B = 12:00 AM)
01: Version Number, Version 0.1
0A0: Suffix, used to describe special functions.
Above is the introduction provided by the Shanghai Siemens PLC module supplier. If you have any further questions, feel free to consult our website, where we have professionals ready to explain.


























