The MÜLLER ALMNS-OG is a high-precision analog strain gauge amplifier (DMS-Industrial Module) designed to process signals from force, weight, or pressure sensors. This module converts low-level mV/V signals from strain gauge full bridges into standardized industrial analog outputs, making it a critical component for integrating load cells and torque sensors into PLC-based automation systems.

 

Product Overview

The ALMNS-OG is engineered for versatility and reliability in demanding industrial environments. It can support up to four 350 Ω full-bridge sensors simultaneously, providing a summed signal output. With its extensive range of DIP switch and solder bridge adjustment options, the device can be precisely calibrated to match the specific sensitivity and range requirements of various sensing applications.

 

Technical Specifications (Datasheet)

 

Key Technical Features

• Selectable Output Ranges: The output signal can be toggled between current (0/4-20 mA) and voltage (0/2-10 V) using internal DIP switches.
• Integrated Measurement Monitoring: Features a “sensor break” monitoring system that can drive the output upscale or downscale in the event of a wiring failure.
• Galvanic Isolation: The supply voltage is galvanically isolated from the inputs and outputs, protecting the control system from electrical noise and ground loops.
• Limit Value Switches (Optional): Some configurations include two floating change-over contacts for direct threshold-based switching.
• Signal Filtering: Includes an active low-pass filter (20 dB/Octave) with a default limit frequency of 1 Hz to ensure stable readings in vibrating environments.

Country of Origin

Country of Origin: Germany (Müller Industrie-Elektronik GmbH)

 

Primary Application Fields

The Müller ALMNS-OG is widely used for:

• Tank and Silo Weighing: Summing the signals from multiple load cells for inventory management.
• Material Testing: Measuring force and tension in industrial presses or tensile testing machines.
• Platform Scales: High-accuracy weighing in logistics and manufacturing.
• Torque Measurement: Conditioning signals from rotating or static torque transducers in test benches.

 

Operating Instructions

1. Mounting: Install the module onto a standard DIN rail. Ensure there is adequate ventilation around the polycarbonate enclosure.
2. Bridge Wiring: Connect up to four 350 Ω strain gauges to the input terminals. If using fewer than four, ensure the bridge resistance remains above 80 Ω.
3. Sensitivity Adjustment: Set the DIP switches to match the mV/V rating of your sensors (e.g., 1.5 mV/V or 2.0 mV/V).
4. Zero Point Calibration: Use the integrated “Zero” potentiometer to calibrate the output signal when the sensor is under no-load conditions.
5. Output Scaling: Use the “Gain” potentiometer to align the maximum sensor load with the maximum analog output (e.g., 20 mA).