Siemens 7MH4405-1AA00 Weighing Module

Technical Overview

The Siemens 7MH4405-1AA00 is a data processing module designed for industrial weighing and force measurement applications. This module belongs to the SIWAREX family of weighing electronics, providing high-precision signal processing for load cells and strain gauges. It interfaces directly with SIMATIC S7 PLCs via the backplane bus. Moreover, the 7MH4405-1AA00 delivers accurate weight measurements for batching, filling, and checkweighing tasks. The module handles both static and dynamic weighing processes with excellent reliability.

Key Technical Specifications

Parameter	Specification
Model	7MH4405-1AA00
Product Type	Data Processing Module / Weighing Module
Compatible Systems	SIMATIC S7-300
Number of Channels	1 weighing channel
Sensor Compatibility	Load cells and strain gauges
Resolution	Up to 16 bits (65,000 steps)
Accuracy	±0.05% of full-scale range
Measurement Principle	Strain gauge bridge with 6-wire technology
Excitation Voltage	5 V DC (sensor supply)
Input Sensitivity	0.1 µV per division
Filtering	Digital filters with adjustable settings
Communication	S7 backplane via P-bus
Indicators	LED for module status and fault detection
Power Supply	5 V DC from S7 backplane
Current Consumption (5V)	150 mA typical
Dimensions	1 slot width (25 mm) × 125 mm × 130 mm
Weight	Approximately 0.3 kg
Operating Temperature	0°C to 60°C

Performance and Application Benefits

The 7MH4405-1AA00 provides high-precision weight data processing for industrial weighing applications. Moreover, the 16-bit resolution delivers accurate measurements even with small weight changes, ensuring product quality and consistency. In addition, the module supports 6-wire load cell connections, which compensate for cable resistance variations and maintain measurement accuracy over long distances. Consequently, the integrated digital filters reduce noise from mechanical vibrations and electrical interference. Furthermore, the module offers diagnostic capabilities for sensor breakage and overload detection. Therefore, this data processing module is well-suited for batching, dosing, filling, and checkweighing systems in food processing, chemical, and pharmaceutical industries.