6ES7331-7HF01-0AB0

Overview

• Model: 6ES7331-7HF01-0AB0

• Type: SIMATIC S7‑300 Analog Input Module (SM 331)

• Application: Provides 8 galvanically isolated analog input channels for current/voltage measurement in S7‑300 systems, supporting interrupts, diagnostics, and isochronous mode

Electrical Ratings

• Input Current:

  • From load voltage L+: max. 50 mA (without load)

  • From backplane bus 5 V DC: max. 60 mA

• Power Loss: Typical 1.5 W

• Analog Inputs: 8 channels, 14‑bit resolution

• Conversion Time: 0.052 ms per channel

• Permissible Input Voltage (destruction limit):

  • Max. 20 V DC permanent

  • Max. 75 V DC for 1 s (duty factor 1:20)

• Permissible Input Current (destruction limit): Max. 40 mA

Isolation

• Isolation Type: Galvanically isolated

• Isolation Test Voltage: 500 V DC

Connectivity

• Connection Method: Required front connector, 20‑pin

Mechanical Specifications

• Width: 40 mm

• Height: 125 mm

• Depth: 120 mm

• Weight: Approx. 200 g

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