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SIMATIC HMI

Siemens SIMATIC HMI operator panels are industrial human-machine interface devices for machine-level process visualization, operator input, and status monitoring in SIMATIC-based automation systems. The SIMATIC HMI family covers a range of panel types from compact Basic Panels with combined key/touch operation to larger Comfort Panels designed for more complex visualization tasks, with display sizes running from 7" to 12" widescreen TFT. With 883 products in this collection, SIMATIC HMI represents a high-priority replacement category for facilities running existing SIMATIC installations.

PLC Direct supplies Siemens SIMATIC HMI panels to maintenance and procurement teams managing existing SIMATIC installations. Our collection covers KTP Basic Panels, Comfort Panels across multiple screen sizes, and associated HMI accessories.

Where Siemens SIMATIC HMI Panels Are Used

A failed SIMATIC HMI panel at a machine station deprives the operator of the ability to monitor process status, acknowledge alarms, and make manual adjustments, often forcing a production hold or manual workarounds that introduce operational risk. In facilities running older SIMATIC HMI hardware, exact replacement units are not always available through standard channels, and lead times on less common panel variants can run several weeks.

Facilities that depend on Siemens SIMATIC HMI panels include:

Discrete manufacturing lines where SIMATIC HMI panels serve as machine operator interfaces for production control and fault acknowledgment
Packaging and filling line operations requiring touchscreen panels for recipe management and batch tracking
Food and beverage processing facilities using SIMATIC HMI panels for process monitoring at individual equipment stations
Water and wastewater pump stations running SIMATIC HMI panels for remote status visualization
Conveyor and material handling systems in mining and distribution, where operators rely on panel-based control interfaces
Chemical and pharmaceutical batch operations using SIMATIC HMI for operator-controlled sequencing and alarm management

When a SIMATIC HMI panel fails, and a replacement is needed to keep a machine or line running, having access to surplus sealed or refurbished stock outside standard OEM channels reduces repair time.

Siemens SIMATIC HMI Products

The SIMATIC HMI collection includes Basic Panels and Comfort Panels in multiple sizes, as well as accessories. All product families and model references below are confirmed on the live PLC Direct collection page.

Product Families

SIMATIC HMI Basic Panels (KTP Series, 2nd Generation): Combined key/touch operation panels for standard visualization applications. Confirmed in collection: KTP700 Basic (6AV2123-2GB03-0AX0), 7" TFT display, 65,536 colors, PROFINET interface. Configurable from WinCC Basic V13 / STEP 7 Basic V13.
SIMATIC HMI Comfort Panels (TP Series): Touch-only operation panels for more complex visualization environments with higher color depth and dual interface connectivity. Confirmed in collection:

- TP700 Comfort (6AV2124-0GC01-0AX0): 7" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP, 12 MB configuration memory, Windows CE 6.0
- TP900 Comfort (6AV2124-0JC01-0AX0): 9" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP, 12 MB configuration memory, Windows CE 6.0
- TP1200 Comfort (6AV2124-0MC01-0AX0): 12" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP, 12 MB configuration memory, Windows CE 6.0
- All Comfort Panels are configurable from WinCC Comfort V11 or later.

Available at PLC Direct

SIMATIC HMI KTP700 Basic panel, 7" TFT, 65,536 colors, PROFINET (6AV2123-2GB03-0AX0)
SIMATIC HMI TP700 Comfort panel, 7" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP (6AV2124-0GC01-0AX0)
SIMATIC HMI TP900 Comfort panel, 9" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP (6AV2124-0JC01-0AX0)
SIMATIC HMI TP1200 Comfort panel, 12" widescreen TFT, 16 million colors, PROFINET + MPI/PROFIBUS DP (6AV2124-0MC01-0AX0)

What to Know Before You Buy Siemens SIMATIC HMI

Ordering the correct SIMATIC HMI panel requires matching three variables: the panel series and type, the display size, and the interface configuration required by the installed network. An incorrect panel series will require project reconfiguration and may not be compatible with the existing WinCC project without modification.

Hardware condition options: PLC Direct supplies SIMATIC HMI panels as surplus sealed, refurbished, and used hardware. Surplus sealed units are factory-sealed stock; refurbished units have been tested and restored to operational condition.

Configuration software compatibility: Basic Panels require WinCC Basic or STEP 7 Basic V13 or later. Comfort Panels require WinCC Comfort V11 or later. Replacing a Basic Panel with a Comfort Panel, or substituting a different Comfort Panel size, may require adapting the WinCC configuration before the panel can be deployed.

Interface requirements: Basic Panels in this collection connect via PROFINET only. Comfort Panels include both PROFINET and MPI/PROFIBUS DP interfaces. If the installed system uses PROFIBUS DP communication to the HMI panel, a Comfort Panel is required; Basic Panels will not support that connection type.

Display size selection: Comfort Panels are available at 7", 9", and 12" widescreen TFT sizes. All three carry the same interface specification and configuration memory. The selection is determined by the physical cutout size in the existing control panel door and the visualization complexity required by the application.

Warranty: All Siemens SIMATIC HMI hardware purchased from PLC Direct includes a standard 1-year warranty covering defects and functionality, applicable to surplus sealed, refurbished, and used products.

Frequently Asked Questions

PLC Direct carries SIMATIC HMI panels from the KTP Basic Panel series and Comfort Panel series, covering display sizes from 7" to 12". Confirmed in collection: KTP700 Basic, TP700 Comfort, TP900 Comfort, and TP1200 Comfort. Contact us with your specific part number to confirm current availability on the exact panel variant needed.

Basic Panels, such as the KTP700, support combined key/touch operation and connect via PROFINET only. They are configured with WinCC Basic or STEP 7 Basic. Comfort Panels are touch-only, offer 16 million color depth (compared to 65,536 on Basic Panels), support both PROFINET and MPI/PROFIBUS DP, provide 12 MB of configuration memory, and are configured with WinCC Comfort. Comfort Panels support more complex project structures and are required for PROFIBUS DP panel connections.

A Comfort Panel can physically replace a Basic Panel, but the WinCC project will need to be adapted because the two series use different configuration software (WinCC Basic vs. WinCC Comfort) and different project structures. The Comfort Panel cannot simply load a project created for a Basic Panel without conversion. For a direct like-for-like hardware swap, the replacement panel should match the original series.

Yes. SIMATIC HMI Comfort Panels in this collection include both PROFINET and MPI/PROFIBUS DP interfaces, making them compatible with legacy PROFIBUS DP fieldbus installations. This dual-interface capability is specific to the Comfort Panel series and is not available on the KTP Basic Panels, which support PROFINET only.

SIMATIC HMI Basic Panels in this collection are configurable from WinCC Basic V13 / STEP 7 Basic V13. SIMATIC HMI Comfort Panels can be configured in WinCC Comfort V11 or later. The engineering station must have the correct WinCC version installed before a replacement panel can be configured and loaded.