Siemens S7-300 Input module for use with ACS400 Part number 6AG1331-7KB02-2AB0

Product Overview

The Siemens SIPLUS S7-300 SM 331 module (6AG1331-7KB02-2AB0) is an analog input module designed for the S7-300 automation system. It provides 2 isolated analog inputs (2 AI) with a wide range of measurement options including current, voltage, thermocouples, and resistance thermometers. The module is built with a conformal coating for operation in harsh environments (-25 °C to +70 °C) and supports high-resolution measurement (9/12/14 bit) with diagnostics and alarm functionality.

Key Features

• 2 analog inputs (2 AI) with galvanic isolation
• Input types: voltage, current, thermocouple, Pt/Ni resistance thermometer, resistor
• High resolution: up to 14 bit measurement resolution
• Harsh-environment variant with conformal coating and extended temperature range (-25 °C … +70 °C)
• Diagnostics and alarm functions integrated
• Fits 20-pole connector for S7-300 backplane insertion/removal during active bus operation

Technical Specifications

• Product Series: SIPLUS S7-300 SM 331
• Article Number: 6AG1331-7KB02-2AB0
• Load Voltage (L+): 24 V DC rated
• Without load current: max. 80 mA
• Backplane bus current: max. 50 mA (5 V DC) under no-load
• Measurement resolution: up to 9/12/14 bit depending on input type
• Operating Temperature: -25 °C to +70 °C (conformal coated version)
• Dimensions: Width ~40 mm, Height ~125 mm, Depth ~120 mm
• Weight: Approx. 250 g
• Country of Origin: Germany

Compliance & Certifications

• CE-marked according to applicable EU directives
• UL, FM, KC, EAC approvals (model dependent) for industrial use
• Conforms to environmental and reliability standards for harsh industrial conditions
• RoHS-compliant from 01.01.2012 (for substance restrictions)

Applications

Ideal for analog measurement and data-acquisition tasks in modular automation systems, especially where harsh environmental conditions prevail. Commonly used in industrial control panels, process monitoring systems, machine-tool instrumentation, and manufacturing systems requiring precise analog input measurement with integrated diagnostics.