Piezo technology is a reliable and proven meachnism used in many high-tech applications and products. It is based on the ability of piezoelectric crystals to generate low-voltage electric potential in response to the applied mechnical stress.
Piezo and reverse piezoelectric effects are used in printing equipment, ultrasonic transducers,
fuel injectors, acoustic equipment, laser mirror alignment and piezoelectric devices.
In HMI solutions, low voltage piezo actuators activatied by touch generate 300mA or 1.5A pulse,
which is then converted to the desired electrical output. For basic momentry action performance, a piezo switch or keypad requires no external power supply.
Essential components of HMI interfaces, switches, keypads and keyboards have to meet specific requirements imposed on the whole systems, and full consideration must be given to the environment in which HMI will be deployed. Where fine dust, cleaning solutions, fuel or other liquids may come into contact with switches or control panels it is important to select components with an appropriate rating for environments protection and explosion proof. A number of ratings, introduced to the industry, allow to standardize the products according to their behavior in different conditions.
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