Siemens PLC Expansion module for S7-300, analogue Part number 6ES7331-7PF11-0AB0

Product Overview

The Siemens 6ES7331-7PF11-0AB0 is a module in the SIMATIC S7-300 series (SM 331 family) configured as an isolated analog input module with 8 thermocouple inputs. It supports types B, E, J, K, L, N, R, S, T and TXK/TXK(L) according to GOST standards, features a 16-bit resolution and a conversion time of 50 ms per channel.

Key Features

• 8 analog input (AI) channels for thermocouples (types B, E, J, K, L, N, R, S, T, TXK/TXK(L))
• Galvanically isolated input circuits for high measurement integrity
• Support for 16-bit resolution over all channels with 50 ms conversion time per channel
• S7-300 40-pole front connector interface (1×40-pole) for integration into SIMATIC racks

Technical Specifications

• Product Series: SIMATIC S7-300 analog input modules (SM 331)
• Article Number: 6ES7331-7PF11-0AB0
• Number of Inputs: 8 analog channels
• Input Type: Thermocouples – types B, E, J, K, L, N, R, S, T, TXK/TXK(L)
• Resolution: 16 bits (two’s complement)
• Conversion Time: 50 ms per channel
• Supply Voltage (Load Voltage L+): 24 V DC rated value
• Reverse-Polarity Protection: Yes
• Input Current from L+ (without load): Max. 240 mA
• Input Current from Backplane Bus 5 V (max): 100 mA
• Power Loss (typical): 3 W
• Net Weight (Approx.): 0.324 kg

Compliance & Certifications

• Meets Siemens internal quality standards for SIMATIC instrumentation modules
• RoHS-compliant (since 31 March 2008)
• Designed for industrial temperature ranges and operating environments typical of automation systems

Applications

The 6ES7331-7PF11-0AB0 is suitable for use in manufacturing plants, processing facilities and automation setups where multiple thermocouple temperature measurements are required. It integrates seamlessly into the SIMATIC S7-300 control system, enabling accurate temperature monitoring and control in machine diagnostics, process control loops and industrial instrumentation racks.