Siemens 6ES7331-7PF01-0AB0 SIMATIC S7-300 Analog Input SM 331, 8 AI, RTD Original Brand New

Overview

Siemens 6ES7331-7PF01-0AB0 is a high-precision SIMATIC S7-300 SM 331 analog input module designed for reliable temperature and resistance measurement in industrial automation systems. Featuring 8 isolated analog inputs, support for 2/3/4-wire connections, and compatibility with RTD sensors such as Pt100, Pt200, Pt1000, and NI sensors, this module ensures accurate signal processing even in demanding environments.

Built with GOST 16 characteristic curves, 24-bit internal resolution, and a 50 ms conversion time, it delivers excellent measurement accuracy and system stability. The module integrates seamlessly into S7-300 PLC systems via a 40-pole connector, making it ideal for process control, manufacturing, and energy applications.

Key Benefit

• High Precision: Offers 16-bit resolution (internal 24-bit) for extremely accurate data conversion.

• Versatile Connectivity: Supports a wide range of RTDs including Pt100, Pt1000, Ni100, and Ni1000.

• Flexible Wiring: Compatible with 2-wire, 3-wire, and 4-wire configurations to compensate for cable resistance.

• Robust Protection: Features galvanic isolation between the channels and the backplane bus to protect your PLC hardware.

Function & Features

• Analog Input Module: SM 331

• Number of Inputs: 8 Analog Inputs (AI)

• Connection Types: 2-wire, 3-wire, and 4-wire

• Supported Sensors:

  • RTD: Pt100 / Pt200 / Pt1000

  • Nickel: NI100 / NI120 / NI200 / NI500 / NI1000

  • Resistor inputs

• Characteristic Curves: GOST 16

• Resolution: Internal 24-bit

• Conversion Time: 50 ms

• Connector: 1 × 40-pole

• Isolation: Yes

• System Compatibility: SIMATIC S7-300

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