OVERVIEW

Official designation: Siemens 6ES7 331-1KF01-0AB0 (SM 331, Analog Input Module)

Role/Application: Isolated 8-channel analog input module for SIMATIC S7-300 PLCs, providing 13-bit resolution for precise acquisition of voltage, current, resistance, and RTD temperature signals.

KEY SPECS SUMMARY

Power: Current consumption from backplane 90 mA

Interfaces / Ports: 40-pin front connector

Indicators: No diagnostic interrupt or limit-value interrupt

Operating Temp: Relative tolerance over range plus or minus 0.6 percent

Platform / Compatibility: SIMATIC S7-300 / ET 200M

Limit: Max input current destruction limit 40 mA

Lifecycle: Discontinued October 1, 2012; successor 6ES7 331-1KF02-0AB0

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the typical power loss of the 6ES7 331-1KF01-0AB0 module?

A: The typical power loss for the module is 0.4 W.

Wiring & Installation:

Q: What is the maximum permitted common-mode voltage between inputs when connecting transducers?

A: The maximum permitted common-mode voltage between inputs is 2 V.

Troubleshooting & Compatibility:

Q: What is the maximum permissible continuous input voltage for voltage inputs on the module?

A: The maximum permissible continuous input voltage is 12 V.

Replacement & Upgrades:

Q: What is the primary difference in sensor support between this module and its successor 6ES7 331-1KF02-0AB0?

A: The successor model adds support for PTC and KTY resistance temperature sensors.