Siemens 6AG1123-2DB03-2AX0 — Detailed Product Profile, Technical Specifications, Applications and Related Models

1. Product Overview

The Siemens 6AG1123-2DB03-2AX0 is a SIPLUS HMI KTP400 Basic Color PN operator panel designed for industrial machine operation, process monitoring, and operator interaction. It combines a compact color touchscreen with PROFINET communication, allowing operators to view machine status, enter setpoints, acknowledge alarms, and interact with compatible automation controllers.

This model is based on the standard 6AV2123-2DB03-0AX0 KTP400 Basic Color PN panel. The SIPLUS version adds conformal coating and supports an extended specified operating temperature range of −20°C to +60°C, making it suitable for selected industrial installations where environmental conditions are more demanding than those in a typical control room.

The panel uses a 4.3-inch widescreen TFT display with LED backlighting and a resolution of 480 × 272 pixels. Its compact format makes it useful for small machines, local control stations, packaging equipment, and production systems where operators need clear visual feedback without a large HMI screen.

A PROFINET interface supports communication with compatible controllers and industrial networks. The panel also supports a range of Ethernet-based communication options, including EtherNet/IP and Modbus TCP/IP, subject to the selected configuration and connected system.

2. Brand and Product Series

3. Detailed Technical Specifications

The following table covers the main electrical, display, mechanical, communication, and environmental characteristics of the 6AG1123-2DB03-2AX0.

Important dimensional and weight note: The catalogue and technical datasheet present different weight figures. For purchasing and logistics, use the applicable catalogue weight; for mechanical design, use the technical drawing and the unboxed dimensions. The panel cutout is not the same as the overall front-panel dimensions.

3.1 Display and operator input

The 4.3-inch color display is intended for compact operator interfaces. Its 480 × 272 resolution is suitable for straightforward process graphics, alarm messages, numerical values, simple trends, and machine-status screens.

The resistive touchscreen registers operator input through pressure. This makes it appropriate for common industrial HMI interactions, including pressing on-screen buttons, selecting menus, and entering values through the displayed keyboard.

Four physical function keys provide an additional way to trigger frequently used operations. These keys can be assigned functions in the HMI project, depending on the application design.

3.2 Electrical characteristics

The panel uses a nominal 24 V DC supply, with a permissible range of 19.2–28.8 V DC. Its typical active power consumption is approximately 3 W, making it a relatively low-power device for a local operator station.

When planning the power supply, allow for the panel’s actual consumption and the requirements of any other devices connected to the same supply. Correct polarity, suitable overcurrent protection, and appropriate wiring are essential for reliable operation.

3.3 Communication capabilities

The PROFINET interface allows the HMI to exchange data with compatible controllers and automation equipment. Depending on the project configuration, the screen can display PLC values, change setpoints, acknowledge alarms, and show operating states.

The product also lists support for Ethernet-based protocols such as EtherNet/IP and Modbus TCP/IP. Protocol support does not mean every controller can communicate with the panel automatically; the correct driver, connection settings, addressing, and project configuration must be in place.

3.4 Environmental protection

The SIPLUS version includes conformal coating and has a specified operating temperature range of −20°C to +60°C. These features make it a candidate for selected industrial applications where humidity, temperature variation, or environmental contaminants may be a concern.

The front is rated IP65 when correctly installed, while the rear is rated IP20. This distinction matters: the complete assembly must be installed correctly, and the rear of the panel should not be assumed to have the same protection as the front.

4. Product Introduction

The 6AG1123-2DB03-2AX0 provides the operator interface between a machine’s control system and the person operating the equipment. It displays information generated by the automation controller and provides a convenient way for authorized personnel to interact with the process.

In a typical installation, the HMI is mounted in a machine control panel. The operator sees a screen showing the current machine state, production values, alarm messages, or operating instructions. When the application permits it, the operator can also enter numerical values, select operating modes, and issue commands through the touchscreen or function keys.

The compact screen size is particularly useful when the operator only needs a limited set of controls. Rather than installing a larger panel with unnecessary screen area, a 4.3-inch HMI can provide a practical interface for one machine or one section of a production line.

The KTP400 Basic Color PN is also suited to applications where straightforward visual interaction matters more than advanced graphics or complex data visualization. Its role is to provide clear, usable information for daily machine operation.

Because it is a SIPLUS variant, the model is designed with additional environmental robustness in mind. This can be beneficial in suitable industrial locations where a standard HMI may not meet the environmental requirements.

5. Main Applications

5.1 Machine operation and monitoring

The panel can serve as the primary local operator interface for compact machinery. It can display operating status, production counters, selected machine parameters, and warnings.

Operators can use the touchscreen to navigate screens and perform functions permitted by the control program. Examples include starting a permitted sequence, selecting a product recipe, or adjusting a setpoint.

The safety of any command depends on the PLC logic and machine design. Safety-related functions should not rely on the HMI alone.

5.2 Packaging machinery

Packaging equipment often needs a compact interface for setting production parameters and monitoring machine conditions. The panel can show counters, selected operating modes, alarm messages, and process values.

Typical examples include packaging stations, labeling machines, filling equipment, and small conveyor-based systems. The precise screens and commands depend on the machine’s control program.

5.3 Material handling and conveyors

A local HMI can help operators check conveyor status, review fault messages, and select permitted operating modes. It can also provide a convenient interface for maintenance personnel when diagnosing faults.

The 4.3-inch display is most suitable when the number of values and commands is relatively limited. Larger systems with numerous conveyor zones or extensive diagnostic screens may benefit from a larger HMI.

5.4 Small process-control systems

The panel can display process values and provide operator input for compatible process-control applications. Depending on the PLC program, these values may include temperature, pressure, flow, level, or equipment status.

The HMI itself is not a measuring instrument or process controller. It displays and edits values provided by the automation system, while the connected sensors, controllers, and output devices perform the actual measurement and control functions.

5.5 Water and utility equipment

Compact pumping systems, water-treatment skids, and industrial utility units may use a local HMI to display operating conditions and alarms.

The panel can provide a convenient interface for authorized operators to view status information and adjust permitted settings. Environmental suitability should be checked against the actual location and installation conditions.

5.6 Industrial installations with demanding environmental conditions

The conformal coating and specified operating temperature range make this SIPLUS panel relevant to selected installations with more demanding environmental conditions than a typical office or control room.

Possible applications include machinery in humid production areas or equipment exposed to temperature variation. Suitability must be assessed against the complete environmental specification, including the actual exposure to condensation, chemicals, vibration, and cleaning processes.

5.7 Maintenance and troubleshooting stations

An HMI can provide technicians with machine status, fault codes, diagnostic messages, and maintenance-related information programmed into the control system.

A well-designed interface can reduce the time required to identify a fault and locate the affected machine section. The quality of the diagnostic experience depends largely on the PLC program and HMI project, not only on the hardware.

6. Product Advantages

6.1 Compact installation

The 4.3-inch display and compact housing make the panel suitable for small control cabinets and machines with limited space. Its relatively small footprint can be useful when several individual machines each need a local operator interface.

6.2 Clear color display

The TFT display supports 65,536 colors and a resolution of 480 × 272 pixels. This is sufficient for many basic machine screens, status indicators, alarm lists, numerical fields, and simple process graphics.

Using color consistently can help operators distinguish normal operation, warnings, faults, and selected operating modes.

6.3 Touchscreen and physical function keys

The touchscreen supports flexible menu layouts and context-sensitive controls. The four physical function keys can be assigned frequently used operations, allowing the application designer to combine touch interaction with physical buttons.

This can make routine operation more convenient when the most important functions are kept consistent across screens.

6.4 PROFINET connectivity

The PROFINET interface supports communication with compatible automation controllers. This makes the panel suitable for networked machine-control architectures where the HMI needs to exchange process data and commands with the PLC.

A networked architecture can also simplify integration with other compatible devices, provided that the overall network design and project configuration are correct.

6.5 Low power consumption

With typical active power consumption of approximately 3 W, the panel places a relatively small load on the 24 V DC supply.

Low power consumption is useful in compact control panels, particularly when several electronic devices share the same power supply. The supply must still be sized for the complete installation and any starting or transient loads.

6.6 Environmental robustness

The SIPLUS version includes conformal coating and specifies an operating temperature range of −20°C to +60°C. These characteristics can support use in environments that require additional protection compared with ordinary indoor installations.

The front IP65 rating provides protection against dust ingress and water jets under the conditions defined by the rating, when the unit is properly installed. The rear remains IP20, so the mounting and enclosure design must account for that limitation.

6.7 Support for multiple communication options

In addition to PROFINET, the specified communication capabilities include EtherNet/IP and Modbus TCP/IP. This may be useful in installations that integrate equipment using different industrial Ethernet protocols.

Before selecting a protocol, verify the exact compatibility requirements of the controller, engineering software, and HMI configuration.

6.8 Practical maintenance interface

The panel can display alarms and diagnostic messages programmed into the HMI project. A clear alarm structure can help maintenance personnel identify the problem, understand the affected equipment, and follow a defined troubleshooting process.

A well-planned HMI screen layout can also reduce unnecessary navigation and make routine operation easier for less experienced users.

6.9 Suitable for distributed machine layouts

The panel can be installed near the machine or process it controls, giving operators access to local status and commands. This is particularly useful when a plant has multiple independent machines or production stations.

A local interface can reduce the need for operators to return to a central control room to check routine machine conditions.

7. Installation and Configuration Considerations

Before installing the 6AG1123-2DB03-2AX0, the following points should be included in the engineering checklist.

– Panel cutout: Use the specified cutout of approximately 123 × 99 mm and confirm the exact mechanical drawing before cutting the enclosure.

– Mounting depth: Allow for the unit’s depth and the space required behind the panel for connectors and cables.

– Power supply: Provide a regulated 24 V DC supply within the permissible 19.2–28.8 V range.

– Network configuration: Set the correct IP address, network parameters, and controller connection settings for the intended PROFINET or other supported communication protocol.

– HMI project: Configure screen layouts, tags, alarms, recipes, and operator functions using compatible engineering software.

– Front sealing: Install the panel correctly to maintain the specified front protection rating.

– Rear protection: Remember that the rear protection rating is IP20. Do not assume the rear can tolerate the same water or dust exposure as the front.

– Temperature: Confirm that the installation remains within the specified −20°C to +60°C operating range.

– Orientation: Follow the mounting and ventilation requirements for the chosen orientation.

– Commissioning: Test all displayed values, input fields, alarm messages, communication links, and permitted operator commands before handing the machine over for production.

8. Five Related Models in the Same Series

The following products belong to the SIPLUS Basic Panel family or closely related HMI configurations. They offer alternatives with different display sizes, communication interfaces, and operator-input arrangements.

Dimensions and weights are provided where confidently established. For other variants, the exact hardware drawing should be checked rather than assuming that a similarly named panel has identical mechanical characteristics.

8.1 How to choose among these related models

6AG1123-2DB03-2AX0 — KTP400 Basic Color PN

Best suited to compact machines with a limited number of screens, parameters, and operator functions. It is a practical choice when space is restricted and a small color touchscreen is sufficient.

6AG1123-2GB03-2AX0 — KTP700 Basic Color PN

A larger screen can make alarm lists, process graphics, and machine-status information easier to read. It may be preferable when operators need to see more information at once.

6AG1123-2GA03-2AX0 — KTP700 Basic DP

This variant is relevant when the existing automation architecture uses PROFIBUS DP rather than PROFINET. The communication interface should be the deciding factor when selecting between the DP and PN variants.

6AG1123-2MA03-2AX0 — KTP1200 Basic DP

The larger display is suitable for applications that need more extensive visual information, such as process overviews, maintenance screens, or complex machine layouts. It is a better candidate where a compact 4.3-inch panel would require too much screen navigation.

6AG1123-2MB03-2AX0 — KTP1200 Basic PN family variant

A large-format PN panel may be appropriate when the control system requires PROFINET connectivity and the operator needs a larger display. Confirm the exact ordering code and interface configuration before purchasing.

9. Five Popular Models from the Same Brand

These models are common examples from the wider industrial automation portfolio. They perform different functions and are not direct replacements for the 6AG1123-2DB03-2AX0.

9.1 Role of each model in an automation system

– 6AV2123-2DB03-0AX0: The standard KTP400 Basic Color PN is the closest comparison to the SIPLUS version. The main selection question is whether the standard environmental specification is sufficient for the installation.

– 6ES7214-1AG40-0XB0: A PLC from the S7-1200 family can execute control logic, process inputs, control outputs, and exchange data with a compatible HMI.

– 6ES7511-1AK02-0AB0: An S7-1500 controller may be appropriate for applications requiring a different level of controller performance, diagnostics, or system architecture.

– 6GK5005-0BA00-1AB2: An unmanaged Ethernet switch can connect compatible network devices where the network topology requires additional ports.

– 6EP1333-2BA20: A suitable 24 V DC power supply can provide power to the HMI and other compatible control components, subject to the supply’s current rating and the total system load.

10. Product Selection Comparison

11. Final Product Assessment

The Siemens 6AG1123-2DB03-2AX0 is a compact SIPLUS HMI panel intended for machine operation and monitoring. Its 4.3-inch color touchscreen, four physical function keys, PROFINET interface, 24 V DC supply, and conformal coating make it a practical option for small industrial operator stations.

Its strongest advantages are its compact installation size, straightforward operator interface, low typical power consumption, and environmental specifications intended for selected demanding industrial installations.

It is particularly suitable when operators need to view machine status, acknowledge alarms, enter values, and interact with a PLC through a local panel. For applications requiring extensive process graphics, many simultaneous values, or complex navigation, a larger HMI from the same product family may be a better fit.

Before purchasing, verify the exact ordering code, communication interface, engineering-software compatibility, mounting dimensions, and net weight for the intended hardware revision. The SIPLUS environmental features are valuable only when the actual installation conditions and the complete panel assembly are compatible with the product’s specified limits.