6ES7331-1KF02-0AB0 Analog Input Module | 8 AI, 13-bit

Siemens 6ES7331-1KF02-0AB0 S7-300 analog input module. 8 channels, ±10V/0-20mA, 13-bit. For high-precision signal acquisition.

Product: Siemens 6ES7 331-1KF02-0AB0 Analog Input Module

The Siemens 6ES7 331-1KF02-0AB0 (commonly written as 6ES7331-1KF02-0AB0) is an 8-channel analog input module for the SIMATIC S7-300 PLC system. It is designed for high-precision acquisition of standard analog signals from sensors and transmitters.

Key Features

• High Channel Density:​ Eight isolated analog input channels in a single module.

• Wide Input Range:​ Configurable per channel for voltage or current measurement.

• High Resolution:​ 13-bit + sign bit resolution for precise measurement.

• Channel Isolation:​ Channels are electrically isolated from each other and the backplane bus.

Technical Specifications

• Order Number:​ 6ES7 331-1KF02-0AB0

• Product Family:​ SIMATIC S7-300

• Module Type:​ Analog Input, 8 Channels

• Input Ranges (per channel, software configurable):

  • Voltage: ±10 V, ±5 V, 1 to 5 V

  • Current: ±20 mA, 0 to 20 mA, 4 to 20 mA

• Resolution:​ 13 bits + sign (for ±10V range)

• Conversion Time per Channel:​ 55 ms (for all 8 channels, including cycle time)

• Basic Error Limit:​ Typically ±0.5% of full scale

• Electrical Isolation:​ 500 V AC between channels and backplane bus

• Connection:​ Via front connector (40-pin)

• Power Supply:​ From S7-300 backplane bus (no external supply required)

• Width:​ 40 mm

• Module Code:​ 0AB0 (Internal Siemens hardware revision/identifier)

Function

This module converts analog process signals (e.g., from pressure transmitters, temperature sensors with transmitters, or potentiometers) into digital values for processing by the S7-300 CPU. Each channel can be individually configured for the desired signal type and range using STEP 7 programming software.

Typical Applications

Used in SIMATIC S7-300 PLC racks for:

• Process variable monitoring (pressure, temperature, flow, level)

• Acquisition of signals from laboratory and test stands

• Machine and plant automation requiring multiple analog signals

Important Note

This is a standard analog input module. It requires a 40-pin front connector​ (ordered separately, e.g., 6ES7 392-1AJ00-0AA0) for wiring. Signal configuration (range, diagnostics) is done entirely in the STEP 7 hardware configuration. It is not suitable for direct connection of thermocouples or RTDs without a signal conditioner.

Note: Specifications are for product identification and comparison. For full technical data, wiring diagrams, and configuration guidelines, consult the official Siemens manual for the S7-300 analog modules.

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