Concentric rotary switches, available from Dedicated Systems Australia , provide dual functionality in limited spaces. The concentric rotary switches are mainly used in avionics and high-end devices. ELMA have also launched a concentric rotary switch that will open up new areas of application.
The cockpit of a helicopter or aircraft accommodates numerous display and control elements in a small space and pilots cannot waste time in trying to locate switches and buttons. The concentric rotary switches provide an ergonomic design, which is ideal for operations in emergency situations. The concentric rotary switches provide robustness, ease of use and high functional density in small spaces.
To counter the problems of limited space, two functions were combined and integrated into a single rotary switch element with concentric knobs. This has been applied to applications such as portable radio equipment.
An example for the use of the concentric rotary switch is that the user can select a communication group from the outer ring and adjust the volume using the inner knob. This type of operation is also useful in connection with laboratory or audio equipment, especially while adjusting logically related variables.
The E37 from ELMA integrates two complete rotary switches into a single unit by building on the established modules of the E33 encoder.
The E37 is made up of freely combinable modules. For both rotary switches, customers can choose between 16 and 32 positions. Each revolution generates 8 or 16 impulses. The switching torque can be selected according to the application. A touch function can also be integrated for the inner switch. The casing is available in THT vertical and THT horizontal styles. With both rotary switches individually adjustable to specific applications, the E37 is available in over 800 variants.