Product Overview

The Siemens 7MH4910-0AA01 is a high-precision SIWAREX CS weighing module specifically engineered for the SIMATIC ET 200S distributed I/O system. This compact electronic unit serves as the primary interface for strain gauge load cells, converting force into highly accurate digital data for process automation. Designed for seamless integration, it allows for the direct connection of sensors for scales, hopper level monitoring, and tension measurement without the need for additional transmitters. By utilizing the internal backplane bus of the ET 200S, the 7MH4910-0AA01 provides real-time weight values directly to the PLC, enabling rapid response times and unified engineering within the SIMATIC TIA Portal or STEP 7 environment.

Integrated Measurement and Hardware Profile

• Internal Resolution: 16-bit A/D conversion for fine-increment measurement

• Measurement Accuracy: 0.05% of final value (typical)

• Sampling Frequency: 50 Hz measurement rate for dynamic weighing tasks

• Calibration Range: Supports up to 2000d high-precision calibration

• Safety Standards: Certified for use in Ex zone 2 (hazardous area protection)

• Module Mass: 0.08 kg

• Hardware Dimensions: 3 x 5.5 x 8.5 cm

• Interface Support: Integrated into SIMATIC Manager via PROFIBUS DP or PROFINET

• Load Cell Support: Direct connection for strain gauges in 4-wire or 6-wire technology

• Country of Manufacture: Germany

• Customs Tariff (HS): 8537101190

Industrial Load Management and Weighing Applications

This SIWAREX module is a fundamental component for industries requiring rigorous material tracking and precise dosing. Key deployment scenarios include:

• Silo and Tank Level Monitoring: Providing continuous, non-contact-style mass calculation for bulk solids and liquids to prevent overfills and stockouts.

• Platform Scale Integration: Turning standard ET 200S stations into high-accuracy weighing terminals for manufacturing and logistics hubs.

• Chemical Batching Systems: Implementing precision dosing and mixing where 0.05% accuracy is required for volatile or expensive raw materials.

• Tension Control: Monitoring web tension in paper, foil, or textile processing lines via load cell feedback.

• Hazardous Environment Weighing: Utilizing its Ex Zone 2 certification to safely measure materials in oil, gas, and petrochemical production facilities.

• Automatic Limit Monitoring: Setting up to two independent limit values to trigger alarms or stop production when target weights are reached.