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PRODUCT PROFILE
SERIESSIMATIC S7-300
CONDITIONNew Original
WARRANTYOne year
AVAILABILITYIn stock
Siemens 6ES7331-7KF01-0AB0
SM 331 8 AI Analog Input Module
An eight-channel S7-300 analog input module with configurable 12 to 14 bit measurement.
DETAILED PRODUCT DESCRIPTION
S7-300 analog input module
The SIMATIC S7-300 SM 331 provides eight analog input channels with configurable 12 to 14 bit resolution. It supports voltage, current, resistance, resistance thermometer and thermocouple measurement in modular controller stations.
18 analog inputs
212 to 14 bit resolution
3Universal signal measurement
Official technical data
Product designationSM 331 AI 8x12 bit
Analog inputs8
Resolution12 to 14 bit
Signal typesVoltage / current
System integration
Temperature inputsRTD / thermocouple
Resistance inputSupported
Controller familySIMATIC S7-300
Front connector40-pin
✓
Diagnostic Protection
Use the controller diagnostic buffer and measured-value status when tracing analog signal problems. Check range configuration, channel wiring and common reference conditions before replacing the module.
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Installation & Upgrade
Install the module in a compatible S7-300 rack and connect the documented 40-pin front connector. Before replacement, back up the hardware configuration, isolate field power and verify the complete article number and channel ranges.
Brand characteristics
Siemens S7-300 signal modules combine configurable measurement ranges, coordinated rack integration and documented lifecycle support.
Platform coordinationMatched I/O, interfaces and engineering tools
Documented lifecycleClear order numbers and product data
Field-ready designDistributed hardware for industrial environments
Application fields
This module supports mixed analog acquisition in machine control, process measurement and installed S7-300 systems.
Process measurementVoltage and current inputs
TemperatureRTD and thermocouple signals
System serviceS7-300 analog expansion
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