This application note shows how to use a Fibaro Universal Dimmer 2 module with a 3-position (On/Off/On) momentary switch.
It is based on a UK style 2-wire lighting system with no neutral at the switch.
A 3-position momentary, or retractive, switch has 3 positions and is also known as an ON/OFF/ON switch.
It normally stays in the central (Off) position, you can then press the top or bottom parts of the switch to move it into the On positions. As this is a momentary (retractive) switch, it only remains in the On state while you press it, it returns to the central Off state when the button is released.
Why use a 3-position Switch
This type of switch provides another way of controlling the Fibaro Dimmer 2 (and the light it is connected to):
- Top ON
- Press once and release - turns light onto full brightness or previously set dim level
- Press and hold - increases brightness, releasing it keeps the lamp at that brightness
- Bottom ON
- Press once and release - turns light off
- Press and hold - decreases brightness, releasing it keeps the lamp at that brightness
Installation and Configuration
The switch and Dimmer 2 module can be connected to the lighting system as follows.
Fibaro Dimmer 2 Parameter Setting:
The following parameters need to be set:
Installing the Fibaro Dimmer modules involve working with 240V mains wiring. If you are not comfortable doing this you should consult a qualified electrician. This application note is provided as a guide, all work is are carried out at your own risk. Vesternet do not accept any responsibility or liability.
Copyright Vesternet 2015