Description
Unboxing & Hardware Overview
- Manufacturer & Architecture: Siemens AG (SIMATIC S7-300 / ET 200M Distributed Automation Platform)
- Part Number / Model: 7MH4900-2AA01 (Product Designation: SIWAREX FTA — Filling Totalizing Automatic Weighing Module)
- Product Type: Single-Channel Legal-for-Trade Weighing Electronic Module for Strain-Gauge Full Bridges
- Physical Dimensions: Standard SIMATIC S7-300 module format (Approx. 80 x 125 x 130 mm / 3.1 x 4.9 x 5.1 inches)
- Estimated Shipping Weight: ~1.1 lbs (0.5 kg) enclosed in industrial antistatic ESD packaging and structural shock protection
- Primary Condition Status: Factory New / New Surplus / Certified Refurbished options available (verify specific hardware revision tiers with provider prior to dispatch)
Product Introduction
The Siemens 7MH4900-2AA01 (SIWAREX FTA) is a high-performance, precision weighing electronic module designed specifically for integration into SIMATIC S7-300 controllers and ET 200M distributed I/O systems. Engineered for both automatic and non-automatic weighing applications, the module excels in demanding industrial tasks such as rapid dosing, filling, bagging, loading, and totalizing/checkweighing.
With verification capability (legal-for-trade compliance up to 3 \times 6000d), internal resolution of up to 16 million parts, and direct scale control algorithms executed right on the module, the SIWAREX FTA unburdens the central PLC CPU while maintaining sub-millisecond precision for dynamic material-handling loops.
Core Technical Specifications
| Parameter | Value |
| Product Model | 7MH4900-2AA01 (SIWAREX FTA Weighing Module) |
| System Compatibility | SIMATIC S7-300 Programmable Controllers and ET 200M Distributed I/O |
| Weighing Sensors | Strain gauge load cells in full-bridge configuration (1 to 4 mV/V input range) |
| Measurement Resolution | High internal resolution up to 16 million parts |
| Digital Inputs / Outputs | 7 Digital Inputs (DI), 8 Digital Outputs (DQ) |
| Analog & Counting I/O | 1 Analog Output (0/4–20 mA), 1 Counting Input (CI) |
| Communication Ports | RS-232 and RS-485 interfaces (for PC configuration, scale display, or printer hookup) |
| Operating Power | Powered via standard S7-300 backplane bus (24 VDC external auxiliary connection where required) |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Storage Temperature | -40°C to +85°C (-40°F to 185°F) |
| Relative Humidity | Up to 95% non-condensing |
Compliance & Standards Alignment
- Certified for legal-for-trade applications under European EC Certificates of Conformity (OIML R76, R51, R107 standards) when paired with appropriate secure MMC memory cards.
- Built to meet international industrial CE, UL, and cUL electrical safety and electromagnetic compatibility (EMC) regulations.
Technical Note: For legal-for-trade applications, local weights and measures verification laws govern calibration and sealing parameters. Ensure that the specialized calibration memory card (such as the corresponding MMC module) is installed and sealed according to regional metrological authority guidelines.
Storage & Asset Preservation Guidelines
- Store the module inside its original factory antistatic ESD shielding bag to safeguard sensitive analog-to-digital converters and microcontroller components from electrostatic discharge.
- Maintain clean, climate-controlled warehouse storage environments where ambient temperatures remain stable and relative humidity is kept strictly below 60%.
- Avoid mechanical shocks, dropping, or applying heavy pressure to prevent bending the backplane connector pins or cracking the plastic front housing.
Physical Installation Prerequisites
- Ensure that all rack-level power supplies, load cell excitation circuits, and external actuator loops are completely de-energized and locked out (LOTO) prior to module mounting.
- Hang the SIWAREX FTA module onto the standard SIMATIC S7-300 mounting rail and pivot downward to engage backplane bus connectors securely.
- Fasten the front module retaining screw tightly to guarantee proper mechanical grounding and stable backplane data communication.
Buyer’s FAQ & Logistics
Q: What Harmonized System (HS) code applies to this Siemens weighing module?
A: Industrial process control system modules, measuring instruments, and electric weighing machine parts typically classify under HS code 8538.90 or 9031.80. Confirm final codes with your licensed customs broker.
Q: Is the 7MH4900-2AA01 suitable for batching and rapid dosing systems?
A: Yes. The SIWAREX FTA is purpose-built for rapid dosing, filling, and bagging routines, featuring integrated control algorithms that run independently to guarantee high throughput speeds and precise cutoff accuracy.
Q: Is the listed online price final for procurement?
A: Note: Price is subject to market availability, inventory conditions, and module lifecycle tier status; contact our technical sales desk for a formal, time-sensitive quotation.
