SIEMENS 6AV2123-2GA03-0AX0

What is 6AV2123-2GA03-0AX0 and where is it used?

The 6AV2123-2GA03-0AX0 is a Siemens SIMATIC HMI KTP700 Basic DP from the Basic Panels 2nd Generation family. It is a 7-inch operator panel with both key and touch operation, designed for simple to medium-level visualisation and control tasks directly at the machine. Typical applications include machines and systems where operating states, alarms, setpoints, and simple operator screens must be displayed and controlled reliably. Thanks to its PROFIBUS DP connectivity, the device is particularly suitable for existing installations with established DP infrastructure. For maintenance engineers, the panel is valuable when an installed HMI needs to be quickly identified, replaced, or returned to service. For purchasing departments, the exact part number is important because DP and PN versions differ technically and should not be confused.

Overview of the most important technical data and what they mean

The panel features a 7" TFT widescreen display with 800 × 480 pixels and 65,536 colours, providing a clearer display than many older, smaller Basic HMIs. The combination of 8 function keys and an analogue resistive touchscreen makes it suitable for a wide range of standard machine applications, allowing operation through both dedicated keys and direct screen interaction. The device operates on 24 V DC, with a permissible voltage range of 19.2 to 28.8 V DC, and has a typical power consumption of 5.5 W. For communication, the DP version provides 1 × RS422/RS485 interface for PROFIBUS/MPI communication at up to 12 Mbit/s, as well as USB 2.0. Additional installation-relevant characteristics include IP65 protection at the front, IP20 at the rear, and operating temperatures of up to 50 °C in landscape orientation with vertical mounting.

Product status, life-cycle status and obsolescence

Siemens currently lists 6AV2123-2GA03-0AX0 as an Active Product. This is an important consideration for plant operators and purchasing departments, as there is no confirmed discontinuation status in the available manufacturer documentation. The panel belongs to the Standard Devices 2nd Generation product range, providing a stable position within the Siemens HMI portfolio. Engineering support is available from WinCC Basic V13 and STEP 7 Basic V13 onwards. No explicitly designated direct successor has been identified by Siemens for this exact part number in the reviewed documentation. However, Siemens includes this product family in various migration and replacement scenarios for older Basic Panel installations, helping to reduce procurement and upgrade risks in brownfield projects.

Available EICHLER services and when they are relevant in practice

EICHLER offers several practical service options for this panel, including repair, exchange, used devices, new devices, and an optional test report. Repair is particularly economical when the existing device is already engineered, mechanically compatible, and fully integrated into the machine. EICHLER combines repairs with technical cleaning, preventive maintenance, comprehensive functional testing, and a minimum 24-month warranty. This is especially valuable for maintenance teams when downtime must be minimised without creating additional engineering or retrofit work. An exchange unit is often the preferred option when immediate availability is the priority. Used and new devices allow purchasing departments to balance budget, lead time, and supply security according to their specific requirements. The optional test report additionally supports internal approval processes, documentation requirements, and traceable quality assurance.

Is 6AV2123-2GA03-0AX0 a PROFIBUS or a PROFINET panel?

The article number 6AV2123-2GA03-0AX0 identifies the DP variant of the KTP700 Basic, meaning a panel equipped with a PROFIBUS interface. If a PROFINET version is required, the corresponding PN variant must be selected. This distinction is crucial for spare parts procurement because the communication interface, integration and commissioning are directly affected. DP and PN are not merely different naming conventions; they are different communication versions.

Which software can be used to configure 6AV2123-2GA03-0AX0?

The panel can be configured with WinCC Basic V13 / STEP 7 Basic V13 or later. Siemens also notes that the current operating instructions apply to V14 or higher. For operators of existing systems, this is important because the available engineering environment must match the installed device generation. Before replacing or recommissioning the panel, it should therefore always be verified which TIA Portal/WinCC version was used to create the existing project and whether the engineering station still supports that version.

Does the KTP700 Basic DP fit into the mounting cut-out of a KTP600 Basic DP?

Yes. Siemens specifies a mounting cut-out of 197 × 141 mm for the KTP700 Basic / KTP700 Basic DP and lists these devices as compatible with the mounting cut-outs of the KTP600 Basic mono PN, KTP600 Basic colour PN and KTP600 Basic colour DP. This is particularly useful for control cabinet retrofits, as mechanical modifications can often be avoided. However, before ordering, it should also be verified that the project, communication interface and wiring are compatible with the existing machine.

Can an existing WinCC flexible project be migrated to this panel?

In principle, yes, but not without verification. Siemens describes the migration from WinCC flexible 2008 SP2/SP3 to WinCC (TIA Portal) and recommends reviewing the migration report and making any necessary adjustments afterwards. Due to changes in format and screen resolution, graphics, objects and key assignments may need to be adapted. In practice, this means that migration is possible, but it is not fully automatic. Especially in older legacy systems, sufficient time should be planned for functional testing and screen adjustments.

How can I make sure that I am ordering the correct spare-part variant?

The decisive factor is the complete MLFB/order number 6AV2123-2GA03-0AX0. In addition, the communication interface, supply voltage, display size, mounting cut-out, engineering software and environmental conditions should be compared with the existing installation. For this device, the most important characteristics are PROFIBUS rather than PROFINET, 24 V DC, 7-inch display, 800 × 480 pixel resolution and the compatible mounting cut-out. Anyone searching only for “KTP700 Basic” runs a significant risk of ordering the wrong communication variant.