Analogue Module 8AQ

The Siemens 6ES7331-7KF02-0AB0 is an analogue input module from the SIMATIC S7-300 series, specifically the SM 331 family. This module provides eight optically isolated analogue inputs and supports a wide range of voltage, current, and resistance signals for precise measurement in industrial automation applications.

• Inputs: 8 analogue inputs, optically isolated in four channel groups

• Supported Signal Types:

  • Voltage: ±80 mV, ±250 mV, ±500 mV, ±1 V, ±2.5 V, ±5 V, ±10 V

  • Current: ±3.2 mA, ±10 mA, ±20 mA, 0–20 mA, 4–20 mA

  • Resistance: 150 Ω, 300 Ω, 600 Ω (with external resistors)

• Resolution: 12 bits (including sign)

• Cycle Time: 16.7 ms for 8 channels (typical)

• Power Supply:

  • From backplane bus (5 V DC): max. 90 mA

  • From load voltage (24 V DC): max. 40 mA

• Power Loss: Typical 1.5 W

• Operating Temperature: 0°C to +60°C

• Protection Class: IP20

• Dimensions: 40 x 125 x 120 mm (W x H x D)

• Weight: Approx. 260 g

• Diagnostics: Programmable diagnostics, diagnostic interrupts, limit monitoring, end-of-cycle interrupt

• Galvanic Isolation: Between channel groups and backplane bus

• Cable Length: Max. 200 m (shielded)

• Application: Ideal for process automation, monitoring, and control tasks requiring robust and precise analogue signal acquisition