OVERVIEW

Official designation: Siemens 6ES7 331-1KF02-0AB0 (SM 331, Analog Input Module)

Role/Application: Isolated 8-channel analog input module for SIMATIC S7-300 PLC, designed for high-precision acquisition of process and temperature signals including voltage, current, and resistance sensors.

KEY SPECS SUMMARY

Power: 90 mA max from backplane bus 5 V DC

Interfaces / Ports: 1 x 40-pole front connector interface

Indicators: No internal diagnostic LEDs confirmed

Operating Temp: Refer to the latest manufacturer manual.

Platform / Compatibility: SIMATIC S7-300

Limit: Input destruction limit 30 V for voltage input

Lifecycle: Spare part, phase-out since 2023.10.01

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the primary input resolution and conversion time for the module?

A: The module provides 13-bit resolution with a typical 66 ms conversion time for all 8 analog input channels.

Wiring & Installation:

Q: Which front connector accessory is required for this 40-pole analog input module?

A: It requires a 40-pole front connector such as 6ES7392-1AM00-0AA0 (screw) or 6ES7392-1BM01-0AA0 (spring-loaded).

Troubleshooting & Compatibility:

Q: Does the module offer built-in diagnostic features or status LEDs for troubleshooting?

A: Based on available data, the module does not include separate diagnostic LEDs; diagnostics are likely via the CPU.

Replacement & Upgrades:

Q: Is the 6ES7331-1KF02-0AB0 still an active product and what is its status?

A: This module has been in the spare part phase and shows a product phase-out status since October 2023.