Analogue Input Module 8AI

The Siemens 6ES7331-1KF02-0AB0 is an analogue input module from the SIMATIC S7-300 series, specifically the SM 331 family. It features eight optically isolated analogue input channels with a high 13-bit resolution, making it suitable for precise industrial measurement and control applications

• Input Channels: 8 optically isolated analogue inputs

• Supported Signals: Voltage, current, resistance, and resistance thermometer (Pt100, NI100, NI1000, LG-NI1000, PTC/KTY)

• Resolution: 13 bits (including sign bit)

• Conversion Time: 66 ms (module update time)

• Permissible Input Voltage: Up to 30 V (destruction limit), 12 V continuous, 30 V for max. 1 s

• Permissible Input Current: Up to 40 mA (destruction limit)

• Power Consumption: Max. 90 mA from backplane bus (5 V DC), typical power loss 0.4 W

• Input Resistance: 100 kΩ for voltage inputs (0–10 V), 100 Ω for current inputs (0–20 mA)

• Isolation: Optically isolated from the backplane bus and load voltage

• Connector: 1 x 40-pole front connector required

• Dimensions: 40 x 125 x 117 mm (W x H x D)

• Weight: Approx. 300–653 g (varies by source; most sources suggest around 300 g net, but some listings include packaging weight)

• Accuracy: ±0.5–0.6% for voltage, ±0.5% for current, ±0.5% for resistance

• Application: Industrial automation, process control, and data acquisition