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Siemens 6AG1123-2JB03-2AX0 — Product Specifications, Introduction, Applications, Advantages, and Related Models

1. Product Overview

The Siemens 6AG1123-2JB03-2AX0 is a SIPLUS HMI KTP900 Basic Color PN operator panel designed for industrial automation, machine operation, and process visualization. It provides a graphical interface between operators and programmable logic controllers (PLCs), allowing users to monitor operating conditions, enter process parameters, acknowledge alarms, and execute authorized machine commands.

The product belongs to the SIPLUS Basic Panels, 2nd Generation family and is based on the standard KTP900 Basic Color PN hardware platform. Its principal features include a 9-inch TFT color display, an 800 × 480 pixel resolution, touchscreen operation, eight programmable function keys, and a PROFINET communication interface.

A distinguishing characteristic of this model is its SIPLUS environmental configuration. The device incorporates conformal coating and is specified for an operating temperature range of -20°C to +50°C. These characteristics make it a candidate for industrial installations where environmental conditions are an important consideration.

The 9-inch display provides more visualization space than a typical 7-inch operator panel. This can be useful when an application requires several process values, operating buttons, alarm information, and machine-status indicators to be presented in an organized layout.

The device is intended primarily for local operator interaction. It does not replace the PLC, motor drives, safety controllers, or other equipment responsible for executing machine-control functions.

2. Basic Product Information

The dimensions of the housing front and the mounting cutout serve different purposes. The front dimensions determine how much space the panel occupies on the outside of the cabinet, while the mounting cutout determines the opening required for installation.

The net weight of 1.130 kg refers to the device without packaging. The packaging dimensions describe the shipping package rather than the HMI housing.

3. Detailed Technical Parameters

3.1 Display and Operator Interface

The 9-inch display is useful for applications that require more screen space than a compact 4-inch or 7-inch panel can provide.

Operators can use the touchscreen to navigate between screens, enter numerical values, select operating modes, and interact with graphical controls. Physical function keys can be assigned to frequently used actions, depending on the application design.

The screen resolution of 800 × 480 pixels is suitable for many basic industrial visualization tasks. However, the display should not be confused with a high-resolution industrial panel designed for detailed graphics or advanced visualization projects.

3.2 Electrical Parameters

The nominal 24 V DC supply is consistent with common industrial automation control cabinets.

When selecting a power supply, the designer should consider the HMI’s electrical requirements and the combined load of the PLC, sensors, communication devices, and other equipment connected to the same circuit.

A regulated supply with adequate capacity helps maintain stable operation and reduces the likelihood of problems caused by voltage fluctuations or insufficient power capacity.

3.3 Communication and Software Parameters

PROFINET is one of the defining features of this model. It allows the operator panel to communicate with compatible controllers over an industrial Ethernet network.

Before installation, the engineering project should be checked for the correct device type, controller connection, IP addressing, and communication settings.

A PROFINET interface alone does not guarantee compatibility with every controller. The supported protocol and configuration must match the automation system.

3.4 Mechanical and Environmental Parameters

The conformal coating provides an additional protective feature for the electronic assemblies. The specified operating temperature range is also relevant when selecting an HMI for industrial locations with greater temperature variation.

Nevertheless, the product should not be considered suitable for every harsh environment. Direct exposure to aggressive chemicals, water immersion, or unrestricted condensation requires separate evaluation.

The IP65 rating applies to the front under the specified installation conditions. The rear of the panel, cable entries, and surrounding cabinet must be protected according to the requirements of the complete installation.

4. Product Introduction

4.1 Product Function

The Siemens 6AG1123-2JB03-2AX0 is designed to provide a local operator interface for industrial machinery and automation systems.

In a typical installation, the PLC executes the control program and processes signals from sensors, drives, valves, and other field devices. The HMI provides the visual interface through which operators observe the system and interact with the programmed functions.

The panel can be configured to display machine operating status, process values, alarm messages, production counts, and operating parameters.

Depending on the application, it can also provide recipe selection, authorized parameter adjustment, and maintenance information.

4.2 Nine-Inch Display

The 9-inch TFT display provides a larger working area than smaller Basic Panels.

This additional space can be used to organize operating controls and process information more effectively. For example, a machine screen may display a production counter, operating mode, motor status, and alarm indicator without requiring the operator to switch between several screens.

The display supports 65,536 colors and a resolution of 800 × 480 pixels.

Although this specification is suitable for many conventional machine interfaces, the screen layout should be designed carefully to ensure that text, buttons, and indicators remain readable.

4.3 Touchscreen and Physical Function Keys

The touchscreen allows operators to select screen objects, navigate menus, and enter process parameters.

The eight physical function keys provide another method of interacting with the machine. Depending on the HMI project, they can be assigned to frequently used commands or navigation functions.

This combination provides flexibility when designing an operator interface for repetitive production tasks.

4.4 SIPLUS Environmental Characteristics

The SIPLUS version incorporates conformal coating and specifies an operating temperature range of -20°C to +50°C.

These features can be useful when the equipment is installed in locations with wider temperature variation or other environmental considerations covered by the product specification.

The complete installation must still be evaluated for temperature, humidity, condensation, vibration, enclosure protection, and chemical exposure.

4.5 Integration With Industrial Control Systems

The panel is designed for use with compatible automation controllers and supported engineering configurations.

When properly configured, it can display information supplied by the PLC and transmit authorized operator inputs through the communication interface.

The actual functions available depend on the HMI project, PLC program, communication configuration, and installed engineering software.

5. Product Applications

5.1 Manufacturing and Assembly Machinery

The KTP900 Basic Color PN can be used as the local operator interface for assembly machines, production equipment, and general manufacturing systems.

Typical applications include:

• Machine start and stop controls.
• Manual and automatic operating-mode selection.
• Production counter display.
• Operating parameter entry.
• Alarm display and acknowledgment.
• Machine status monitoring.
• Maintenance and diagnostic screens.

The 9-inch display provides additional room for organizing these functions compared with smaller operator panels.

5.2 Packaging and Filling Equipment

Packaging and filling machinery often requires operators to monitor production conditions, adjust authorized settings, and respond to faults.

The HMI can provide screens for recipe selection, product parameters, production counters, operating modes, and alarm messages.

For example, a packaging machine may use the HMI to display the selected product format, target production count, current operating state, and active alarm conditions.

The PLC remains responsible for executing the control sequence and enforcing the necessary operating interlocks.

5.3 Conveyor and Material-Handling Systems

In conveyor systems, the operator panel can display the operating status of motors, conveyors, sensors, and related equipment.

Operators can use the interface to monitor operating sequences, acknowledge faults, view production information, and select permitted operating modes.

PROFINET communication is relevant when the connected controller and other devices use a compatible industrial Ethernet architecture.

5.4 Pumping and Water-Process Equipment

The HMI can provide a local interface for compatible pumping stations and process-control systems.

Typical information includes pump status, tank level, pressure, temperature, alarm conditions, and maintenance information.

The panel can also be configured to display process trends or operating parameters where the engineering environment and application support those functions.

The HMI should not be used as a substitute for independent protective devices, emergency-stop circuits, or safety-related control functions.

5.5 Industrial Equipment in Variable Temperature Conditions

The specified operating temperature range of -20°C to +50°C makes this SIPLUS variant a candidate for selected installations where temperature conditions are more demanding than those found in conventional indoor environments.

Examples include certain industrial production areas and control cabinets exposed to wider ambient temperature variations.

The installation must still be assessed carefully. A cabinet containing drives, power supplies, and other heat-generating equipment can become considerably warmer than the surrounding room.

5.6 Centralized Local Operator Stations

The 9-inch screen can be useful when several operating values and controls need to be presented together.

For example, a machine operator may need to see operating mode, process status, production counts, and alarm information simultaneously.

The additional display space can make screen navigation more convenient and reduce the need to divide the interface into numerous separate pages.

6. Product Advantages

6.1 Larger Visualization Area

The 9-inch display offers more screen space than a 4-inch or 7-inch panel.

This can improve the organization of operating controls and process values, particularly when the machine requires multiple status indicators, parameter fields, and alarm messages.

6.2 Industrial Operator Interface

The combination of touchscreen input and physical function keys supports different operating styles.

Frequently used commands can be assigned to physical keys, while more detailed settings can be accessed through screen-based controls.

6.3 PROFINET Communication

The integrated PROFINET interface is useful for compatible Ethernet-based automation systems.

It allows the HMI to communicate with supported controllers and exchange configured process information over the industrial network.

6.4 SIPLUS Environmental Configuration

The conformal coating and specified operating temperature range distinguish the product from the corresponding standard hardware platform.

These features can provide useful additional environmental characteristics where the installation requirements justify selecting the SIPLUS version.

6.5 Flexible Screen Design

The HMI can be configured with screens tailored to the machine’s operating procedures.

A typical project may include an overview screen, manual operation screen, automatic operation screen, alarm page, parameter page, and maintenance screen.

This allows the operator interface to reflect the actual production process rather than relying on a fixed set of generic controls.

6.6 Improved Access to Machine Information

An appropriately designed HMI can consolidate operating status, alarms, process values, and maintenance information into a single interface.

This can make it easier for operators to understand the machine’s condition and respond to abnormal situations.

6.7 Compact Installation Compared With an Industrial Computer

For applications requiring local visualization rather than a full computer-based interface, an HMI panel can reduce the number of separate devices installed in the control cabinet.

The actual cost benefit depends on the complexity of the project, software requirements, installation costs, and long-term maintenance arrangements.

7. Brand and Product Series

The product’s series classification is important when selecting replacements or expanding an existing automation system.

Models from the same broad family can differ in display size, communication interface, operating temperature, mechanical dimensions, and supported engineering software.

A model from the same series is not necessarily a direct replacement. The complete order number should always be checked before making a purchasing decision.

8. Five Recommended Models From the Same Series or Related Product Families

The following five models provide alternatives for different display sizes, network architectures, and installation requirements.

The exact environmental configuration and mechanical characteristics should be confirmed for each complete order number before procurement.

8.1 Related Model Comparison Table

Important: The table includes the target model and four related SIPLUS variants to support comparison. Weight and mechanical figures should be treated as model-specific values rather than assumed to be identical across the entire product family. The 7-inch KTP700 figures should be confirmed against the exact ordering code before being used for final engineering work.

8.2 Model 1: 6AG1123-2GB03-2AX0 — KTP700 Basic Color PN

This 7-inch SIPLUS operator panel is a related option for installations that require PROFINET communication but need a smaller display.

It can be suitable for machines with relatively straightforward operating screens and a limited number of process values.

Main advantage: Smaller installation footprint.

Main limitation: Less screen space for complex process information and extensive alarm lists.

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

The KTP700 Basic DP is a related model designed for PROFIBUS DP communication.

It is worth considering for existing control systems that use this fieldbus and require a compatible local operator interface.

Main advantage: Relevance to existing PROFIBUS-based installations.

Main limitation: It should not be substituted directly for a PROFINET panel without evaluating the network and engineering changes.

8.4 Model 3: 6AG1123-2JB03-2AX0 — KTP900 Basic Color PN

The target model is a 9-inch SIPLUS operator panel with PROFINET communication.

Its larger screen provides more space for operating controls, process values, alarms, and machine-status indicators.

Main advantage: A practical balance between display size and installation footprint.

Main limitation: Its 800 × 480 resolution may be restrictive for applications requiring highly detailed graphics.

8.5 Model 4: 6AG1123-2MA03-2AX0 — KTP1200 Basic DP

The KTP1200 Basic DP offers a larger display class for installations using compatible PROFIBUS DP communication.

It may be appropriate when operators need to view more information at once or when the application requires a more extensive screen layout.

Main advantage: Larger visualization area.

Main limitation: Requires more panel space and a compatible DP network.

8.6 Model 5: 6AG1123-2MB03-2AX0 — KTP1200 Basic Color PN

The KTP1200 Basic Color PN is a related larger-format operator panel intended for compatible PROFINET-based systems.

It can be considered for machinery requiring more extensive operator visualization and a larger screen area.

Main advantage: Larger display class with PROFINET communication.

Main limitation: Greater installation space requirements and the need to verify project compatibility.

9. Five Additional Siemens Models Worth Considering

The following models represent related standard SIMATIC HMI Basic Panel products. They are candidates for comparison when the installation does not require the additional environmental configuration of the SIPLUS range.

Exact hardware suffixes matter, particularly when identifying the communication interface.

9.1 Comparison Table

The table is intended to help narrow the selection rather than replace the complete technical specification. Dimensions and weights must be verified before they are used for cabinet fabrication or procurement.

9.2 Model 1: 6AV2123-2DB03-0AX0 — KTP400 Basic

The KTP400 Basic class is suitable for compact machines with relatively simple operating requirements.

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

It may be appropriate when the main design priority is minimizing panel space.

9.3 Model 2: 6AV2123-2GB03-0AX0 — KTP700 Basic PN

The KTP700 Basic PN is a standard 7-inch operator panel for compatible PROFINET-based automation systems.

It can provide a practical interface for production counters, process values, operating modes, and alarm information.

It is worth considering when a SIPLUS environmental configuration is unnecessary.

9.4 Model 3: 6AV2123-2GA03-0AX0 — KTP700 Basic DP

The KTP700 Basic DP is relevant to automation systems that use PROFIBUS DP.

Its display class is similar to that of the target model’s platform, but the communication interface differs.

It should be considered only when the network architecture and project configuration support the DP variant.

9.5 Model 4: 6AV2123-2JB03-0AX0 — KTP900 Basic Color PN

The standard KTP900 Basic Color PN is the corresponding hardware platform for the target SIPLUS model.

It provides a 9-inch display, touchscreen operation, physical function keys, and PROFINET communication.

It may be appropriate for conventional indoor applications that do not require the SIPLUS environmental configuration.

9.6 Model 5: 6AV2123-2MB03-0AX0 — KTP1200 Basic Variant

The KTP1200 Basic family is intended for applications that benefit from a larger operator display.

It can be considered when a machine requires more screen space for operating parameters, alarms, process information, and maintenance screens.

The exact communication variant and supported engineering environment must be confirmed before ordering.

10. Comparison Between the Target Model and Its Standard Hardware Platform

The two models share the same general KTP900 Basic Color PN platform, but their environmental configurations differ.

For an application with conventional indoor operating conditions, the standard version may be sufficient. Where the SIPLUS environmental configuration is needed, the target model may be more appropriate.

Neither model should be assumed to be suitable for every environment without checking the installation conditions.

11. Installation and Engineering Considerations

11.1 Mechanical Installation

The target model has a front-panel size of 267 × 182 mm, a mounting cutout of 251 × 166 mm, and an overall depth of approximately 55 mm.

The cabinet designer should allow for rear clearance, cable connections, mounting hardware, ventilation, and maintenance access.

The final cutout should be prepared according to the mechanical drawing for the exact hardware revision.

11.2 Power Supply and Electrical Protection

The HMI uses a nominal 24 V DC supply, with a permissible range of 19.2–28.8 V DC.

The power supply should be sized according to the device’s electrical requirements and the total load of all connected equipment.

Appropriate circuit protection, grounding, and wiring practices should be incorporated into the control cabinet design.

11.3 PROFINET Network Configuration

The panel should be configured to communicate with the intended PLC through a compatible PROFINET network.

The engineering process should include checking IP addressing, device configuration, controller compatibility, network cabling, and communication settings.

If the device is replacing an existing HMI, the original project should be checked before the hardware is changed.

11.4 Engineering Software and Project Compatibility

The engineering software must support the selected panel and its hardware configuration.

When replacing an existing device, verify the device identifier, firmware compatibility, project version, communication drivers, and any required project conversion.

A panel with a similar display size does not necessarily support the same project without modification.

11.5 Environmental Conditions

The specified operating temperature range is -20°C to +50°C.

The temperature at the installation location should be assessed under actual operating conditions, including the heat generated by other components inside the cabinet.

Humidity, condensation, vibration, dust, chemical exposure, and enclosure protection must also be considered.

The conformal coating is an additional protective feature, not a substitute for appropriate environmental engineering.

12. Product Selection Guide

13. Final Product Assessment

The Siemens 6AG1123-2JB03-2AX0 is a SIPLUS KTP900 Basic Color PN operator panel designed for industrial machine operation and process visualization.

Its main technical characteristics include a 9-inch TFT color display, 800 × 480 pixel resolution, 65,536 display colors, touchscreen input, eight programmable function keys, PROFINET communication, conformal coating, and a specified operating temperature range of -20°C to +50°C.

The front-panel dimensions are 267 × 182 mm, the mounting cutout is 251 × 166 mm, and the overall depth is approximately 55 mm. The net device weight is 1.130 kg.

The larger display makes the panel suitable for applications that require more visualization space than a compact 4-inch or 7-inch HMI can provide. Its PROFINET interface is relevant to compatible Ethernet-based automation systems, while the SIPLUS environmental configuration provides an additional selection consideration for demanding installations.

The related KTP700 and KTP1200 models offer alternatives for different display sizes and communication requirements. Standard SIMATIC HMI versions can also be considered when the SIPLUS environmental configuration is not required.

For a direct replacement, the complete order number should be matched first. For a new installation, the decision should be based on communication compatibility, display requirements, mechanical dimensions, environmental conditions, engineering software support, and long-term maintenance needs.

Final purchasing checklist:

• Confirm the complete model number and hardware revision.
• Verify the PROFINET communication requirements.
• Confirm the operating temperature and environmental conditions.
• Check the front dimensions, mounting cutout, and overall depth.
• Use the correct net weight of 1.130 kg for preliminary mechanical planning.
• Confirm the electrical requirements and compatible engineering software.
• Verify the replacement model’s compatibility before ordering.

These checks help ensure that the selected HMI is suitable for the intended machine, installation environment, and automation architecture.