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For Simatic S7 system applications, Siemens 6ES7331-7KB02-0AB0 provides the function of an Analog Input Module.
For replacement planning, this class of module brings discrete field status into the control system. Typical signal sources include switches, relay contacts, permissives, and equipment-status circuits when they match the module's electrical requirements. The installed revision should be confirmed before the product is applied.
Within an S7 installation, the exact hardware order number determines supported interfaces and configuration behavior. System and software compatibility should be checked before replacement. The original equipment schedule should guide compatibility review.
Country of origin is listed as Germany.
In the signal path, this approach helps preserve the intended system function while keeping selection aligned with the documented ratings, capacity, and compatibility requirements. System drawings should be consulted before replacement.
Product phas out begun by Siemens 10.01.2023 without replacement
SIEMENS SIMATIC S7-300 analog input SM 331 isolated 2 AI, resolution 9/12/14 bits, U/I/thermocouple/resistor, alarm, diagnostics
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