6ES7331-1KF02-0AB0 | SIMATIC S7-300 Analog Input SM 331 Module

Product Description

The 6ES7331-1KF02-0AB0 is an analog input module for SIMATIC S7-300. It has 8 isolated inputs. It measures voltage, current, resistance, and RTDs. The resolution is 13 bits. Conversion time is 66 ms. This module is reliable and accurate for industrial use.

Key Technical Specifications

• Model: 6ES7331-1KF02-0AB0
  • Series: SIMATIC S7-300
  • Type: SM 331 Analog Input Module
• Inputs: 8 analog inputs (isolated)
  • Voltage Ranges: ±50 mV, ±500 mV, ±1 V, ±5 V, ±10 V, 0-10 V, 1-5 V
  • Current Ranges: 0-20 mA, 4-20 mA, ±20 mA
  • Resistance: 0-600 Ω, 0-6000 Ω
  • RTD: Pt100, Ni100, Ni1000, LG-Ni1000
• Resolution: 13 bits (with overrange)
• Conversion Time: 66 ms (50 Hz) / 55 ms (60 Hz)
• Supply Voltage: 5 V DC from backplane bus
• Current Draw: max. 90 mA
• Power Loss: typ. 0.4 W

Installation & Mounting

• Mounting: S7-300 rail
• Connector: 40-pin front connector
• Dimensions: 40 x 125 x 117 mm (W x H x D)
• Weight: approx. 250 g
• Shielded Cable: max. 200 m (50 m for 50 mV range)

Accuracy & Environment

• Basic Error (25 °C): ±0.3% to ±0.4% (voltage/current)
• Operational Error (full temp): ±0.5% to ±0.6%
• RTD Accuracy: ±0.8 K to ±1.2 K
• Isolation: 500 V DC (channels to backplane)
• Protection: 30 V max (voltage input), 40 mA max (current input)

Compatibility & Connectivity

• System: SIMATIC S7-300 PLC
• Encoders: 2-wire, 3-wire, 4-wire transmitters
• Linearization: For Pt100, Ni100, Ni1000, LG-Ni1000
• No Diagnostics: No LED or diagnostic alarms

Expert Review

This module is a workhorse for analog signals. It handles many input types. The 13-bit resolution is good for most tasks. Accuracy is solid across temperature. It is easy to wire and configure. A reliable choice for S7-300 systems.

Manager’s Insight

The 6ES7331-1KF02-0AB0 offers great value. It saves space with 8 channels. The wide input range reduces the need for extra modules. Fast conversion helps in time-critical processes. Simple to maintain and troubleshoot.

Applications

• Process monitoring
• Machine control
• Temperature measurement (RTDs)
• Pressure and flow transmitters
• Factory automation

Frequently Asked Questions (FAQ)

• What is the max cable length?
  200 m shielded, but 50 m for 50 mV signals.
• Can I measure thermocouples?
  No, it does not support thermocouples.
• What is the resolution?
  13 bits, including the sign bit.
• Does it need external power?
  It gets power from the backplane bus (5 V DC).
• Is it isolated?
  Yes, between channels and the backplane bus.
• What is the warranty?
  12 months.
• Shipping time?
  12-24 hours dispatch.
• Couriers?
  FedEx, UPS, DHL.

Selection Guide

• Check your signal type (voltage, current, RTD).
• Verify the input range matches your sensor.
• Ensure your PLC is S7-300 series.
• Consider cable length for small signals.
• Plan for 40-pin front connector.

Compare with Similar Models

• 6ES7331-7KF02-0AB0 (higher resolution)
• 6ES7331-1KF01-0AB0 (older version)
• 6ES7332-5HD01-0AB0 (analog output)

Contact Information
Email: sales@powergearx.com
WhatsApp: +86 18030005825

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