Product Overview

The Siemens 6AG1900-2AA01-4AA0 SIPLUS FTA Weighing Module is an industrial weighing electronics module designed for integration into Siemens SIMATIC S7-300 and ET 200M automation systems. Based on the standard SIWAREX FTA weighing module 7MH4900-2AA01, this SIPLUS version combines weighing functionality with conformal coating and enhanced environmental operating capabilities.

The module is intended for applications that require accurate weight measurement and weighing-process control. Typical uses include proportioning, dosing, filling, bagging, loading, and other industrial weighing operations. It can support both automatic and non-automatic weighing systems, allowing manufacturers to incorporate weighing functions into a broader PLC-based production process.

The SIWAREX FTA is a function module within the SIMATIC automation environment. Its integration with S7-300 and ET 200M systems allows weighing operations to be coordinated with machine sequences, process monitoring, and production control logic. This arrangement can help reduce the need for a separate standalone weighing controller in suitable applications.

The SIPLUS version is designed for more demanding environmental conditions than the corresponding standard product. Siemens documentation identifies conformal coating on printed circuit boards and electronic components, with an ambient operating-temperature range of -25 to +70 °C for this catalog number.

The 6AG1900-2AA01-4AA0 is particularly relevant to industrial systems where weighing accuracy, process repeatability, and automation integration are important. For applications requiring official calibration or legal-for-trade weighing, the applicable approval requirements and regulations must be checked before commissioning.

Technical Specifications

Note: Dimensions and weight are the supplied product-listing values. Confirm the physical unit and its packaging dimensions before using these figures for installation or shipping.

Function and Working Principle

The SIWAREX FTA performs weighing-related signal acquisition and processing within an industrial automation system. It receives measurement signals from connected weighing equipment, processes the information, and makes weighing data available to the control system.

1. Load Cell Signal Acquisition

Industrial weighing systems commonly use load cells to convert mechanical force into electrical signals. When material is placed on a weighing platform, tank, hopper, or conveyor scale, the load cells respond to the applied force.

The weighing module receives the signals through the designated weighing-system connections. It processes these signals to obtain weight information that can be used by the automation program.

The accuracy of the complete weighing system depends on the load cells, mechanical installation, wiring, calibration, environmental conditions, and module configuration.

2. Weight Measurement and Processing

The SIWAREX FTA is designed to provide weighing electronics for industrial scales. It supports measurement and weighing functions required by applications such as batching, filling, and loading.

The measured weight information can be incorporated into the PLC control strategy. For example, a batching system can monitor the weight of ingredients as they enter a mixing vessel and use configured setpoints to control material feeding.

3. Automatic Weighing Control

In automatic weighing applications, the module works as part of a programmed sequence. The automation system can use weight information to coordinate feeding, filling, discharge, and other process steps.

A typical automatic filling sequence may include:

1. The system checks that the weighing equipment is ready.
2. Material feeding begins.
3. The weighing system continuously monitors the measured weight.
4. The control system compares the measurement with the configured target.
5. Feeding is stopped or adjusted when the required condition is reached.
6. The completed weighing cycle is recorded or passed to the next production stage.

The exact sequence depends on the machine design, control program, and weighing application.

4. Calibration and Weighing Verification

Accurate weighing requires suitable calibration and verification procedures. The SIWAREX FTA is designed for weighing applications with calibration capability, including applications requiring official verification.

For legal-for-trade installations, users must follow the relevant regulations in the destination country. The existence of a module approval does not automatically certify the entire weighing installation. The scale, load cells, mechanical arrangement, software configuration, and commissioning procedure must also meet the applicable requirements.

5. Communication with the Automation System

The module integrates weighing functionality into the SIMATIC S7-300 and ET 200M environment. This allows weighing data and process information to be used by the wider automation system.

The PLC can coordinate weighing operations with motors, valves, conveyors, feeders, pumps, and other equipment. This integration is particularly useful in production processes where weight measurements directly determine the next machine operation.

Role in Siemens SIMATIC Automation Systems

The 6AG1900-2AA01-4AA0 is intended to operate as part of a Siemens automation architecture rather than as an isolated weighing instrument.

SIMATIC S7-300 Integration

The SIWAREX FTA is designed for use with the SIMATIC S7-300 platform. It can be installed as a function module within the appropriate automation configuration.

The PLC handles machine and process logic, while the weighing module provides specialized weighing functionality. This division allows the automation system to coordinate measurement and production operations.

ET 200M Integration

The module can also be used in ET 200M-based configurations. This allows weighing functions to be incorporated into distributed automation architectures where I/O and control equipment are arranged around the production installation.

The exact rack, backplane, power, and wiring requirements should be confirmed against the applicable Siemens documentation.

PCS 7 Process Automation

The SIWAREX FTA can be integrated into Siemens automation environments that use SIMATIC and PCS 7 technologies. This allows weighing information to participate in broader process-control and monitoring strategies.

In a process plant, weight measurements may be used alongside temperature, pressure, flow, and level information to coordinate production sequences.

Production Data Management

Weight values can provide useful information for batch records, material consumption, production reporting, and quality-control processes.

When correctly integrated with the PLC and supervisory system, weighing data can help operators identify deviations between target and actual material quantities.

Industrial Applications

The Siemens 6AG1900-2AA01-4AA0 is suitable for weighing-related automation applications where its technical specifications and approval conditions meet the project requirements.

1. Industrial Dosing Systems

Dosing systems deliver controlled quantities of raw materials into a production process. The weighing module can provide weight measurements that allow the automation system to monitor the amount of material being added.

Typical applications include chemical processing, food production, building materials, and industrial mixing.

2. Filling and Packaging Machines

Filling equipment often requires accurate measurement of the quantity delivered into containers, bags, or other packages.

The SIWAREX FTA can provide weighing information for automated filling sequences. The PLC can use this information to coordinate feeding mechanisms and determine when the target quantity has been reached.

3. Bagging Systems

Industrial bagging systems use weighing equipment to measure products before or during packaging.

Applications may include powders, granules, agricultural products, minerals, and other bulk materials. The weighing module can support the measurement and control functions required by the automated bagging process.

4. Material Loading and Unloading

Weighing systems are widely used in loading operations where the quantity of material transferred into a vehicle, container, or storage system must be monitored.

The module can be incorporated into a weighing-control architecture that coordinates feeders, conveyors, gates, and other material-handling equipment.

5. Batch Mixing and Proportioning

Batch production often requires several materials to be combined according to predetermined weight ratios.

The weighing module can provide measurement information for each weighing stage. The PLC can use this information to manage the sequence and help maintain consistent batch composition.

6. Industrial Checkweighing

Checkweighing systems measure individual product weights and compare them with configured limits.

The weighing information can be used to identify underweight or overweight products and coordinate sorting or rejection equipment. The exact system design and applicable metrology requirements should be evaluated for each application.

Installation and System Integration

Correct installation is essential for obtaining reliable weighing measurements and maintaining stable operation.

1. Verify the Automation Platform

Before installation, confirm that the target system supports the SIWAREX FTA module. Check the SIMATIC S7-300 or ET 200M hardware configuration, rack arrangement, backplane compatibility, and engineering requirements.

The module should be installed according to the manufacturer’s instructions for the applicable system.

2. Install the Module Correctly

Mount the module in the designated position and ensure that it is securely seated in the compatible rack or backplane.

Check the available installation space and wiring access. The supplied dimensions are 80 × 125 × 130 mm, but the actual mounting envelope and clearance requirements should be confirmed using the module’s mechanical documentation.

3. Connect the Weighing Equipment

Load cells and associated weighing components must be connected using the specified wiring arrangement.

The standard SIWAREX FTA configuration uses a 40-pin front connector for relevant field connections, while serial interfaces and the power supply use their designated connectors. The exact wiring must follow the applicable hardware manual.

Pay particular attention to cable shielding, grounding, and routing. Poor wiring practices can introduce electrical interference and affect measurement stability.

4. Configure the Module

Configure the module according to the weighing application and the automation project’s requirements.

Typical engineering tasks include:

• Selecting the required weighing mode.
• Configuring the connected weighing equipment.
• Setting measurement and operating parameters.
• Defining target weights and process limits.
• Configuring communication with the PLC.
• Establishing alarms and diagnostic responses.
• Preparing calibration and verification procedures where required.

The configuration must be validated before the system is used for production.

5. Perform Calibration and Commissioning

Calibration is essential for ensuring that the weighing system produces reliable measurements.

The commissioning process should include inspection of the mechanical weighing structure, verification of load-cell connections, calibration with appropriate test weights, and confirmation of the measurement response across the intended operating range.

Where official verification is required, follow the regulations applicable to the installation location.

6. Consider Environmental Conditions

The SIPLUS version includes conformal coating and is designed for an extended operating-temperature range of -25 to +70 °C.

However, conformal coating does not make the module suitable for unrestricted exposure to every industrial contaminant. Users should still evaluate humidity, condensation, corrosive substances, vibration, and cabinet conditions before installation.

Compatible System Components

The SIWAREX FTA operates with weighing and automation components that form a complete measurement and control system.

Accessories are not necessarily included with the weighing module. Check the project bill of materials and the module’s documentation before ordering connectors, memory cards, junction boxes, or other components.

Alternative Models and Replacement Considerations

The 6AG1900-2AA01-4AA0 is a SIPLUS version based on the standard SIWAREX FTA 7MH4900-2AA01. When sourcing a replacement, the environmental specification and approval requirements should be considered alongside the weighing function.

A model from the same SIWAREX family is not automatically a direct replacement. Before substitution, compare the number of weighing channels, weighing functions, communication interfaces, approval requirements, software configuration, and mechanical compatibility.

For legal-for-trade applications, the replacement must also meet the applicable metrology and calibration requirements.

Key Advantages

Integration with SIMATIC Automation

The module integrates weighing functions into the SIMATIC S7-300 and ET 200M environment, allowing weight measurement to participate in machine and process control.

Support for Automatic Weighing

It is designed for automatic and non-automatic weighing applications, including dosing, filling, bagging, and loading.

SIPLUS Environmental Design

The conformal coating on printed circuit boards and electronic components provides additional protection for suitable demanding industrial environments.

Extended Operating Temperature

The documented -25 to +70 °C operating-temperature range supports installations that require a wider temperature capability than the corresponding standard configuration.

Calibration Capability

The SIWAREX FTA is designed for weighing applications with calibration capability, including systems subject to official verification requirements.

Process Control Integration

Weight information can be incorporated into PLC logic to coordinate material feeding, filling, batching, and other production operations.

Industrial Weighing Flexibility

The module can support a range of weighing processes, from material proportioning to packaging and loading, when correctly configured for the application.

Technical FAQs

1. What is the Siemens 6AG1900-2AA01-4AA0?

It is a SIPLUS SIWAREX FTA weighing module designed for integration with Siemens SIMATIC S7-300 and ET 200M automation systems.

2. What is the standard product basis of this module?

The SIPLUS 6AG1900-2AA01-4AA0 is based on the standard SIWAREX FTA module 7MH4900-2AA01.

3. What applications is the module designed for?

Typical applications include dosing, proportioning, filling, bagging, loading, and other automatic or non-automatic industrial weighing processes.

4. What is the operating-temperature range?

Siemens documentation for this SIPLUS catalog number specifies an ambient operating-temperature range of -25 to +70 °C.

5. Does the module have conformal coating?

Yes. The SIPLUS configuration includes conformal coating on printed circuit boards and electronic components.

6. Can the module be used for legal-for-trade weighing?

It is designed for weighing applications with calibration capability and has a stated EU type approval of 3 × 6000 d. However, the complete weighing installation must comply with the applicable regulations and approval conditions in the destination country.

7. Which PLC systems are compatible?

The module is designed for Siemens SIMATIC S7-300 and ET 200M systems. The actual hardware configuration should be checked before installation.

8. What accessories may be required?

Depending on the application, accessories may include a compatible 40-pin front connector, MMC memory card, bus connector, shield connection clamps, shield connection elements, and SIWAREX junction boxes.

9. What is the difference between the SIPLUS version and the standard SIWAREX FTA?

The SIPLUS version is based on the standard 7MH4900-2AA01 but includes conformal coating and an enhanced environmental operating-temperature range. The standard weighing functions are based on the corresponding product.

10. What should be checked before purchasing a replacement?

Verify the full catalog number, hardware condition, weighing-system compatibility, connector arrangement, calibration requirements, environmental specifications, and included accessories. For critical weighing installations, request suitable functional testing and documentation.

Procurement and Maintenance Recommendations

When purchasing the Siemens 6AG1900-2AA01-4AA0, verify the complete catalog number on the product label. The distinction between the standard SIWAREX FTA and the SIPLUS version is important because their environmental specifications differ.

For new, surplus, or refurbished modules, request clear product photographs and confirm the condition of the front connector, housing, terminals, and electronic components. Check whether the required accessories are included or must be ordered separately.

For maintenance, inspect the weighing-system wiring, load-cell connections, grounding, cable shielding, and module condition. Protect the installation from unsuitable environmental exposure and follow the specified operating-temperature limits.

Calibration and verification records should be maintained for weighing systems where measurement accuracy affects product quality, material accounting, or legal-for-trade compliance.

If replacing an existing module, record the original configuration and calibration parameters before removal. After installation, verify the weighing response using suitable test weights and confirm that the PLC and production sequence respond correctly.

Conclusion

The Siemens 6AG1900-2AA01-4AA0 SIPLUS FTA Weighing Module is an industrial weighing electronics module based on the standard 7MH4900-2AA01 SIWAREX FTA. Designed for SIMATIC S7-300 and ET 200M systems, it supports weighing applications such as dosing, filling, bagging, proportioning, and loading.

Its conformal coating and extended operating-temperature range make it suitable for selected demanding industrial environments. For successful integration, users should verify the automation hardware, load-cell connections, calibration procedures, accessories, and applicable weighing approvals.

For industrial maintenance and spare-parts procurement, accurate catalog-number identification and confirmation of the module’s physical condition are essential.