Core capabilities
Standard products
USB and other common interfaces cover many industrial applications.
Customized solutions
Cable length, connector, color, quality and protocol can be adapted to the application.
Programmable controllers
Controllers can support USB, EtherCAT, I²C, Profibus and CAN bus.
Matrix scanning
Row and column matrices let a controller scan many keys efficiently.
A variety of interfaces are available for data transfer from the keyboard to the command-processing controller. Standard products on the consumer market are almost always equipped with common USB interfaces.
As other interfaces must be used depending on the application and technical conditions, the selection of possible transmission paths is large and very different.
For example, the commands for all interfaces are combined via an electrical matrix of row and column lines. With a common 16×8 matrix, up to 128 keys can be realized and the data transmission to the microcontroller can take place via 24 lines.
Key rollover and interface selection
A matrix such as 16 × 8 can support up to 128 keys with 24 lines. The controller scans voltage changes, while key rollover limits must be considered; USB commonly supports up to six simultaneous key presses, so the interface is selected around the real use case.
USB (Universal Serial Bus)
USB is widely available, simple to integrate and suitable for many standard input systems. For specialized requirements, we define the most reliable alternative together with the customer.
Would you like more information?
Talk to one of our HMI specialists. We’ll help you identify the right solution or develop a custom HMI tailored to your requirements.