Multicolored Illuminated Piezo Switch Family for SCHURTER PSE0 pages

PSE Multicolor

Application Note

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Multicolored Illuminated Piezo
Switch Family for SCHURTER PSE
SCHURTER expands its successful PSE range of piezo metal line
button style switches with multicolored illumination
Today, SCHURTER's piezo switches are used in many applications, especially in harsh
environments. The advantages of using a piezo switch are many, but one of the key
benefits is their completely sealed surface, which can be activated by applying minimal
force to signal actuation. These switches are now offered with a new multicolored
illumination.

absolutely impervious to leaks. Unlike
pushbuttons with a mechanical stroke, no dirt
can accumulate underneath or around the
switch. This technology is ideal for hygienerelated applications such as those in medical,
the food processing sector and outdoor
applications.

The pulse derived from the force exerts
pressure on the piezoelement, thereby
converting the physical pressure into an
electrical potential. This pressure is sufficient to
produce a clear, potential-free signal, which is
possible with the employed semiconductor
components. Because of the sealed surface,
the product has IP69K seal and thus is

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The new multicolored illumination of the PSE
series greatly expands its application range.
The round button style switch is available with
22 mm, 24 mm, 27 mm and 30 mm diameters.
To make the integration into customer specific
applications as easy as possible, the strands
are color-coded in each of the illumination
colors and are supplied with a voltage range of
5 to 28 VDC providing a brightness that
remains constant in all applications. The
standard version is offered in red, green, and
blue. Additional color options include yellow,
cyan, magenta and white, which can be made
through additive color mixing. As soon as 2 or 3
strands are supplied with voltage at the same
time, the result is a mixed color. Furthermore,
the traffic light colors of red, green, and yellow

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Occupied

The multicolored illumination also allows
multicolored colored status indications. Today
these are used in customer-specific
applications, e.g. in locked access areas to
laboratory rooms.
With this traffic light display (red, green, yellow)­
it is intuitively understood if one can enter the
laboratory, if the room is currently occupied or

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Upon customer request, the supply voltage as
well as the internal resistors can be removed.
This creates the opportunity to present a broad
color spectrum, which requires the addition of
a microcontroller in the application to control
the LED's. Enabling, for example, illumination in
a specified company color and thus supports
matching
corporate
identity
design
requirements. In addition, there is the
possibility of varying the brightness depending
on the design, which allows dimming.

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(RGY) version is also offered as a standard
version. No additive color mixing is required to
produce the color yellow.

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Cleaning
24 V

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Error
0V

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24 V

"Door Access" application example with a multicolored button in the RGB configuration

Switches

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