BECKHOFF KM3701 Differential Pressure Input Terminal

The KM3701 is a precision 1-channel analog input terminal designed for differential pressure measurement. Engineered by BECKHOFF, this module provides a measuring range of -100 to +100 hPa (-100 to +100 mbar), specifically tailored for non-aggressive gas applications. With a high resolution of 0.1 hPa per digit and a fast typical measuring speed of 5 ms, the KM3701 is an essential component for monitoring airflow and pressure differentials in industrial and HVAC systems.

Features

• 1-channel differential pressure measurement
• Measuring range: -100 to +100 hPa (-100 to +100 mbar)
• High resolution: 0.1 hPa per digit
• Fast measuring speed: 5 ms typical
• Suitable for non-aggressive gases
• Overload protection: 500 hPa differential / 5000 hPa to ambient
• Compact Bus Terminal module design

Applications

• HVAC and building automation systems
• Filter monitoring and differential pressure detection
• Industrial gas flow analysis
• Cleanroom environment pressure control

Technical Specifications

Installation Guidelines

• Ensure the medium (gas) being measured is non-aggressive to prevent damage to the internal sensor.
• Mount the terminal on a standard 35 mm DIN rail in an orientation that minimizes external mechanical stress.
• Connect pressure ports using tubing compatible with the terminal’s specifications to ensure a hermetic seal.
• Operate within the specified 0 to +55 degC ambient temperature range to maintain measurement precision.
• Follow EMC standards EN 61000-6-2/EN 61000-6-4 by ensuring correct installation within an electrical enclosure and proper rail grounding.

Compliance and Certifications

• CE
• UL