Siemens 6AG1123-2GA03-2AX0 — Product Specifications, Introduction, Applications, Advantages, and Related Models

1. Product Overview

The Siemens 6AG1123-2GA03-2AX0 is a SIPLUS HMI KTP700 Basic DP operator panel designed for industrial automation applications. It provides a graphical interface between machine operators and a programmable logic controller (PLC), enabling operators to monitor process values, enter parameters, acknowledge alarms, and execute authorized machine commands.

The product belongs to the SIPLUS range and is associated with the SIMATIC HMI Basic Panels, 2nd Generation hardware family. Its 7-inch display and combination of touchscreen input and physical function keys make it suitable for local machine operation and monitoring.

The SIPLUS version is intended for applications where environmental conditions are an important selection factor. Its conformal coating and specified operating temperature range distinguish it from the corresponding standard hardware platform.

The full order number should be used when selecting a replacement, checking compatibility, or preparing a purchasing specification. Models with similar names can differ in communication interfaces, environmental ratings, mounting dimensions, and engineering software requirements.

2. Basic Product Information

3. Detailed Technical Specifications

3.1 Display and Operator Interface

The 7-inch display provides space for operating buttons, status indicators, process values, alarm messages, and basic graphical elements. Its resolution is appropriate for many straightforward machine-control applications.

The combination of touch input and physical keys allows frequently used actions to be assigned to dedicated controls while less frequently used functions remain available on the screen.

3.2 Electrical Specifications

The HMI should be supplied by a stable 24 V DC source. The power supply must be sized according to the total connected load, including the HMI, PLC, communication equipment, sensors, and other devices sharing the circuit.

3.3 Communication and Software

The DP designation is particularly important when selecting a replacement. A PROFIBUS DP panel and a PROFINET panel should not be assumed to be interchangeable simply because they have the same screen size.

3.4 Mechanical and Environmental Specifications

The front-panel protection rating does not automatically establish the protection level of the complete control cabinet. Correct installation, sealing, cutout preparation, cable routing, and environmental assessment remain necessary.

The stated weight is the device net weight. Shipping weight and packaging dimensions may differ.

4. Product Introduction

The Siemens 6AG1123-2GA03-2AX0 is an industrial HMI designed to simplify communication between machine operators and automated equipment.

In a typical automation system, the PLC performs control logic, processes input signals, and manages machine sequences. The HMI provides the operator with a visual interface for viewing operating conditions, entering permitted settings, and responding to system messages.

The KTP700 Basic DP offers a 7-inch display and physical function keys in a compact panel-mounted format. It is intended for applications where a local operator interface is required without the need for a large visualization workstation.

The PROFIBUS DP interface makes the model relevant to existing automation systems built around this communication protocol. Its SIPLUS environmental configuration provides an additional consideration for applications that operate within the specified temperature range and require the protection associated with conformal coating.

The HMI does not replace the PLC or independent safety equipment. Its role is to display information and transmit authorized operator inputs through the configured control system.

5. Main Product Applications

5.1 Manufacturing Machinery

The HMI can be used on assembly equipment, production machines, packaging systems, and general industrial machinery.

Typical functions include machine start and stop commands, operating-mode selection, production counter display, alarm acknowledgment, and parameter entry.

5.2 Conveyor and Material-Handling Systems

In conveyor applications, the HMI can provide information about motor status, conveyor operation, fault conditions, production counts, and operating sequences.

Operators can use the interface to view machine conditions and execute authorized commands. The PLC remains responsible for the control logic and interlocks.

5.3 Packaging Equipment

Packaging machines frequently require recipe selection, product settings, production monitoring, and alarm management.

The HMI can present these functions through configurable screens. The actual capabilities depend on the PLC program and the engineering project.

5.4 Pumping and Process Equipment

For pumping stations and other process equipment, the HMI can display pressure, tank level, pump status, temperature, and alarm information when these values are available from connected devices.

It can also provide access to permitted operating parameters and maintenance information.

5.5 Industrial Equipment in Variable Environments

The SIPLUS version may be considered for installations where its specified operating temperature and conformal coating provide useful environmental characteristics.

The actual suitability of the device depends on ambient temperature, condensation risk, enclosure design, vibration, chemical exposure, and other site conditions. The coating should not be treated as a substitute for suitable enclosure protection.

6. Product Advantages

6.1 Compact Display Design

The 7-inch screen provides a balance between visualization space and installation size.

It can accommodate operating buttons, status indicators, process values, and alarm information without requiring the space needed by a larger operator panel.

6.2 Touchscreen and Physical Function Keys

The touchscreen supports flexible screen design, while the eight physical function keys can be assigned to frequently used operating actions.

This combination allows machine builders to design an interface around the workflow of the equipment.

6.3 PROFIBUS DP Compatibility

For an existing PROFIBUS-based control system, the DP interface can simplify integration compared with adopting an HMI that requires a different network architecture.

Compatibility must still be checked against the PLC, network configuration, engineering software, and communication drivers.

6.4 SIPLUS Environmental Configuration

The conformal coating provides an additional protective feature for the electronic assemblies.

This can be relevant when the intended installation has environmental conditions that justify selecting a SIPLUS product rather than a standard hardware variant.

6.5 Extended Specified Operating Temperature

The specified operating range of -20°C to +50°C gives the product additional flexibility for certain industrial installations.

The actual temperature at the mounting location must remain within the specified limits, including when heat from drives, power supplies, or other equipment raises the temperature inside the cabinet.

6.6 Clear Operator Monitoring

An appropriately designed HMI project can present operating status, alarm messages, process values, and maintenance information in a consistent format.

This can help operators identify faults and understand machine conditions without accessing the PLC programming environment.

6.7 Reduced Need for Separate Operator Computers

For basic machine-control applications, an integrated HMI can eliminate the need for a separate industrial computer dedicated to local operator interaction.

The overall cost benefit depends on project complexity, engineering requirements, installation costs, and long-term maintenance needs.

7. Product Series and Family Classification

The SIPLUS designation identifies the environmental product range, while KTP700 Basic DP identifies the HMI product type and communication variant.

These distinctions are important because products within the same broader family can have different communication interfaces, screen sizes, environmental specifications, and hardware revisions.

8. Five Recommended Related Models

The following models provide a comparison of compact, similar-sized, and larger operator panels. Some are related to the target model by product family, while others represent alternatives with different communication or visualization characteristics.

Technical note: The exact suffix and hardware revision must be confirmed before ordering. The specifications below are intended as a preliminary selection guide; unverified mechanical figures are identified accordingly.

8.1 Model 6AG1123-2DB03-2AX0 — KTP400 Basic DP

This compact HMI class is worth considering for machines that require only a limited number of operating screens and status indicators.

Its smaller display can reduce the space needed on a control cabinet door. The trade-off is a smaller visualization area for alarm lists, detailed process information, and complex navigation.

8.2 Model 6AG1123-2GB03-2AX0 — KTP700 Basic PN

A PROFINET-based alternative may be suitable when the PLC and control network use PROFINET rather than PROFIBUS DP.

Although the screen size is similar to the target model, the communication interface is a critical difference. A change from DP to PN may require network changes and modifications to the engineering project.

8.3 Model 6AG1123-2GA03-2AX0 — KTP700 Basic DP

This is the reference model for the comparison.

Its 7-inch display, physical function keys, PROFIBUS DP interface, and SIPLUS environmental configuration make it a relevant option for supported industrial applications using an existing DP network.

8.4 Model 6AG1123-2JB03-2AX0 — KTP900 Basic Variant

A 9-inch HMI class can provide additional screen space for alarm lists, process values, and operating parameters.

It may be worth considering when operators need to view more information simultaneously. The exact communication variant and mechanical drawing must be checked before selecting a particular order number.

8.5 Model 6AG1123-2MA03-2AX0 — KTP1200 Basic DP Variant

A larger HMI class can be useful for machinery with more extensive visualization requirements.

It can provide room for more detailed operating screens and a greater number of process indicators. It also requires more installation space and may involve different project and hardware requirements.

9. Five Related Siemens SIMATIC HMI Models

The following table compares standard SIMATIC HMI Basic Panel model references with the SIPLUS target product.

These standard models belong to the broader related HMI family, but their environmental configuration differs from the SIPLUS version.

9.1 KTP400 Basic

The KTP400 Basic is appropriate for compact machines with relatively simple operator requirements.

Its smaller screen can accommodate basic controls, operating status, and straightforward alarm messages.

9.2 KTP700 Basic PN

The KTP700 Basic PN is a candidate for compatible PROFINET-based systems.

Its 7-inch display class provides space for machine status, operating parameters, and alarm screens.

9.3 KTP700 Basic DP

The KTP700 Basic DP is the standard hardware counterpart associated with the SIPLUS target model.

It is worth evaluating for conventional installation environments where the PROFIBUS DP interface is required and the additional SIPLUS environmental configuration is not necessary.

9.4 KTP900 Basic

The KTP900 Basic offers a larger display class than the KTP700.

It may be appropriate for machinery with more process values, more detailed screens, or greater requirements for operator navigation.

9.5 KTP1200 Basic

The KTP1200 Basic provides a larger visualization area for more complex machine-control interfaces.

It is worth considering when screen layout and readability are more important than minimizing installation space.

10. Model Selection Comparison

11. Installation and Maintenance Considerations

11.1 Mechanical Installation

The target model has a front-panel size of 214 × 158 mm and an overall depth of approximately 39 mm.

The panel cutout should follow the applicable mechanical drawing. Adequate clearance should be provided for mounting clips, cable connections, ventilation, and maintenance access.

11.2 Power Supply

A regulated 24 V DC power supply should be selected according to the total connected load and the electrical installation requirements.

Appropriate circuit protection, grounding, and wiring practices are important for reliable operation.

11.3 Communication Network

For PROFIBUS DP applications, the network topology, station addresses, connectors, termination, and cable installation must be configured correctly.

If replacing the panel with a PROFINET version, the communication architecture and HMI engineering project must be evaluated before the hardware is changed.

11.4 Engineering Software

The original project should be checked for compatibility with the replacement panel’s hardware identifier, firmware, and supported engineering environment.

A replacement device with similar screen dimensions may still require project conversion or communication changes.

11.5 Environmental Conditions

The SIPLUS version’s specified operating temperature range is -20°C to +50°C.

The actual installation temperature, humidity, condensation risk, vibration, and exposure to chemicals should be considered when evaluating suitability. Environmental protection should be assessed for the complete installation rather than for the HMI alone.

12. Final Assessment

The Siemens 6AG1123-2GA03-2AX0 is a SIPLUS KTP700 Basic DP operator panel designed for industrial visualization and local machine operation.

Its main characteristics include:

• A 7-inch TFT display with 800 × 480 pixel resolution.

• Touchscreen input and eight physical function keys.

• PROFIBUS DP communication.

• A 24 V DC nominal supply.

• A conformal-coated SIPLUS configuration.

• A specified operating temperature range of -20°C to +50°C.

• Front-panel dimensions of 214 × 158 mm.

• A net weight of 0.800 kg.

The KTP400, KTP700, KTP900, and KTP1200 classes offer different options for screen size and installation requirements. The most suitable choice depends on the existing communication network, the amount of information that must be displayed, environmental conditions, and the compatibility of the engineering project.

For direct replacement, the complete order number should be the starting point. For a new installation, communication compatibility, mechanical dimensions, environmental requirements, and long-term maintenance considerations should be evaluated together.

Final procurement reminder: Exact dimensions, net weight, operating limits, hardware revision, and communication variant should be confirmed against the specification for the precise order number before purchasing or designing the control cabinet.