Square Instead of Rectangle

The core of the button is the custom ZBD display, developed specifically for us, which enables the dynamic display of texts and symbols on the 26.5 mm × 26.5 mm button surface. Even without power, it retains the screen content. The RGB backlighting allows for color adjustments based on the button’s status, such as pressed or unpressed. Developing this square display was one of the greatest challenges in the process.

In what way?

Traditional displays are rectangular due to the Chip-On-Glass technology, where the electronics are embedded directly onto the display glass. The space required for this typically makes a square display shape, at least with an acceptable border width, impractical. In our case, however, we use Chip-On-Flex technology, where the electronics are placed on the flexible cable instead. This allows us to keep the border symmetrically narrow and achieve a square display. Finding a partner to develop such a display for Schlegel was not easy, but we ultimately found a suitable partner in Actron.

Is the push button only intended as a panel solution?

There are different versions: a single button monitored and controlled by an external system, and a multi-button solution where up to 128 buttons can be connected. The multi-button solution enables high scalability for complex control requirements, making it particularly suitable for larger control systems. Through a gateway that acts as a bridge between the multi-button network and the external system, the push buttons communicate seamlessly with one another. They are monitored and controlled by an external system, such as a PLC or IPC. All Flexitast buttons are connected by a cable up to 30 meters long, with a maximum distance of 5 meters between individual buttons. Additional functions or interfaces can be implemented upon customer request.

Are any specific technical requirements needed by the user?

No special technical requirements are necessary. Configuration is done through a web browser, allowing users to customize symbols, colors, and blinking functions individually. The IP65-rated push button is protected from wear and damage by a glass shield over the display. The display technology ensures no burn-in effects. The Flexitast is designed for up to one million switching cycles.

In what application scenarios do you see this button being used?

Anywhere dynamic, visual controls, real-time status displays, or customizable options are needed. Examples include industrial control systems, where it can be used to visually monitor and control machines and equipment. With flexible symbol and color customization, processes can be monitored, and any change in switching status is instantly displayed. In mechanical engineering, where precise control and status monitoring are necessary, the button provides visual feedback on machine states. Finally, it can also be used in vehicle controls or control centers to dynamically display the status of systems like signal systems, barriers, or transport vehicles.

Schlegel at SPS 2024: Hall 9, Booth 456