EAO is expanding its Series 51 range with a buzzer for acoustic feedback.
Versatile. Attractive and compact.
Olten, Switzerland, July 2026 – The Series 51 comprises a wide range of HMI Functions and offers a broad range of sizes, colours, shapes and materials. Thanks to its low back panel depth, compact monoblock design and wide variety of front designs, the Series 51 is suitable for almost unlimited applications and fields of use. As an expert partner for Human Machine Interfaces (HMIs), EAO is now expanding the Series 51 with an additional HMI function – a buzzer for acoustic feedback.
With its rectangular design, the buzzer blends seamlessly into the Series 51 range, enabling a consistent, harmonious design for user interfaces – from push buttons and indicators right through to the buzzer. With the appropriate wiring, the Series 51 buzzer can generate either a continuous tone or an intermittent tone (~2–3 Hz*). This allows a single HMI Component to cover both a warning and an alarm function. Developers of control panels thus benefit from simpler bills of materials and fewer qualification steps. The volume of the sound output, with a sound pressure level of 88 dB(A), can be adapted to industrial environments, and the wide voltage range from 10–26 VAC/VDC to 10–75 VDC* allows for highly flexible use in a variety of applications.
The buzzer really showcases its advantages in applications involving frequently recurring signals, such as machine alarms or vehicle warning systems. As there are no moving mechanical parts or contacts, there is no mechanical wear and tear, even with intensive use. This ensures high reliability throughout its entire lifetime and reduces maintenance requirements to a minimum.
Advantages
- Long electrical and acoustic lifetime, low maintenance costs
- Compact and timeless design, matching series 51
- Versatile applications thanks to two sound modes and a wide voltage range
The versatile Series 51 product family combines compact construction and reliability with a timeless design, and is now complete with the addition of the buzzer.
For further information on Series 51, please visit www.eao.com/51
* depending on the product variant