Warning: CM3-Home is not a certified DALI controller !
An open hardware is implemented on it so we can't warranty the fully functionality with any DALI devices
The physical interface consists of 2 wires, DALI Power and DALI Data. The DALI system consists of one DALI Control module with up to 63 DALI devices.
Bi-phase decoding is accomplished with the following:
A physical high signal on the DALI Data line is a voltage level between +9.5V and +22.5V. A physical low signal on the DALI Data line is a voltage level between -6.5V and +6.5V.
The DALI digital layer consists of 2 frames, a forward frame and a backward frame.
The DALI protocol allows a master controller options to address all ballasts by either broadcast to all, Groups of ballasts, and individual addressing.
The most commonly used direct commands allow the controller to modify lighting brightness, scene settings for groups, fading capability and varying rates. Also including are Query command that request the ballast to send a backward frame with configuration data such as, power levels, scene levels, current address.
Using “extended” Configuration command the DALI controls can modify addresses of each ballast thus eliminating manual configuration of the DALI system.
The “extended” configuration command will follow immediately after a DALI controller sends an INITIALIZE ($A5) command, which informs all other DALI devices on the bus to ignore further commands until a TERMINATE command is observed or 30 s elapses in time.