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Siemens SIWAREX 7MH4900-2AA01 FTA Weighing Module
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- Overview
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Overview
- Match the exact suffix and Siemens product family.
- Confirm the current project, firmware and hardware configuration.
- Verify power, communication, mounting and wiring requirements.
- Record settings and complete functional tests before production use.
7MH4900-2AA01 Single-channel legal-for-trade automatic weighing module
Single-channel legal-for-trade weighing module for S7-300 and ET 200M with load-cell, digital, analog and serial interfaces.
At a Glance
| Manufacturer | Siemens |
|---|---|
| Article Number | 7MH4900-2AA01 |
| Product Type | Single-channel legal-for-trade automatic weighing module |
| Core Function | Processes load-cell signals for dosing, filling, checkweighing and totalizing |
| Application / Compatible Series | SIMATIC S7-300 and ET 200M weighing systems |
Product Overview
SIWAREX FTA integrates automatic weighing functions into SIMATIC S7-300 and ET 200M systems. It is designed for dosing, filling, checkweighing and totalizing tasks using strain-gauge load cells.
Engineering must match the load-cell signal range, scale mechanics, wiring, legal-for-trade requirements, I/O allocation and calibration records of the installed weighing application.
Key Functions
Automatic Weighing
Supports dosing, filling, checkweighing and totalizing functions.
Load-Cell Measurement
Connects full-bridge strain-gauge load cells in the 1 to 4 mV/V range.
Integrated Interfaces
Provides digital I/O, analog output and RS 485/RS 232 communication.
Official Specifications
| Module Designation | SIWAREX FTA |
|---|---|
| Weighing Channels | 1 |
| Legal-for-Trade Capability | Supported |
| Load Cell Type | Strain-gauge full bridge |
| Load-Cell Signal Range | 1 to 4 mV/V |
| Digital Inputs | 7 |
| Counter Input | 1 |
| Digital Outputs | 8 |
| Analog Outputs | 1 |
| Serial Interface 1 | RS 485 |
| Serial Interface 2 | RS 232 |
| Controller Integration | SIMATIC S7-300 |
| Distributed I/O Integration | ET 200M |
| Supported Tasks | Dosing, filling, checkweighing and totalizing |
Frequently Asked Questions
Which load cells are compatible with 7MH4900-2AA01?
Use full-bridge strain-gauge load cells whose combined signal and impedance match the documented input limits and scale design.
How is 7MH4900-2AA01 integrated into an S7 station?
Install it in the supported S7-300 or ET 200M configuration and assign the module parameters, I/O addresses and weighing blocks in the project.
What calibration data must be preserved for 7MH4900-2AA01?
Retain zero, span, scale interval, characteristic data, adjustment weights and the legally relevant parameter record where applicable.
Which applications can be implemented with 7MH4900-2AA01?
The module supports automatic dosing, filling, checkweighing and totalizing tasks.
How should the load-cell wiring for 7MH4900-2AA01 be installed?
Use shielded measurement wiring, separate it from power cables, maintain the specified grounding concept and check junction-box connections.
What commissioning tests are important for 7MH4900-2AA01?
Check zero stability, calibration points, digital controls, analog output, serial communication and the complete weighing sequence.
Can 7MH4900-2AA01 be exchanged without recalibrating the scale?
After hardware replacement, verify the transferred data and perform the calibration and legal checks required by the application and local metrology rules.
