Datasheet / Installation diagramsTouchless Lift button AL-27-DS operates from a low-voltage power source and provides a simple digital output when a finger is detected in front of the button.
The touchless lift button sensor works through most materials and is resistant to dirt deposits on the surface of the sensor, such as dust and grease. It can reliably detect a hand or a finger even through clothing.
This is a dual-color LED version of the touchless elevator button.The backlighting LED inside the button has two colors. The primary color is active while the power is applied. The color changes to the secondary color when the button is activated (a finger is detected). The change between the primary and secondary LED colors can also be made via a dedicated LED input, giving the elevator control electronics control over the LED color.
Single color model, AL-27-DS (with only a secondary LED) is also available.Unlike optical (IR) touchless lift buttons, AL-27-DS uses patent-pending capacitive sensing technology and is completely unaffected by ambient light or reflective surfaces, which can falsely trigger optical sensors.
Unique sensing technology also enables extremely fast response. Due to this, the lift button typically triggers before the user touches the surface of the button, indicating to the user that the lift button is touchless. Even slightly slower detection, typical for most touchless solutions currently on the market, diminishes this important feature, as most users will touch and press the button before noticing its touchless features.
The button features a stainless steel front plate and is designed to be indistinguishable from regular mechanical lift buttons. This makes it perfect for the direct replacement of existing lift buttons while maintaining the same aesthetics and mechanical strength.
In addition to touchless operation, the AL-27-DS lift button offers a fallback to mechanical operation if needed. By disabling the electronics inside the button, it can operate as a regular mechanical lift button.
The range of the touchless lift button can be changed via a trimmer on the back of the button or via a control input.
The control input enables changing the range or disabling the touchless operation of multiple buttons (for example, all buttons in an installation) via a single wire. The touchless detection range of all buttons can be changed or disabled from a single control point in an installation or even remotely.
In case of a power failure, it automatically falls back to mechanical operation.
Input: 24Vdc
Mounting method: Plastic nut
Mount cutout diameter: 27mm
Output: - Dry (isolated) Solid State Relay contact, Momentary, Normally Open (NO)
(touchless mode) - Mechanical push button, Normally Open (NO)
(mechanical mode)Detection range: 5-30mm
(See datasheet for more information)More color options are available upon request