The communication channel uses the same signal as the old EIB system. The data format is similar to EIB. You can find some more informations about the successor KNX here in this wikipedia article.
Why using wires and not RF?
Using wires have some advantages:
- No batteries required for the switches,
- no need for power supplies in the relay modules,
- power consumption for the complete system might be better.
- no interference with other RF systems
But has one disadvantage: It's necessary to have an additional wiring in the house electrics. The best way to build it in is during building or renewing phases.
The Switch Module
This module provides four switches, which can send up to 16 different commands. The commands can be grouped, so that one switch can send e.g. three different comands.
The size of the module allow it to mount it directly on the wall. It can be covered by a slightly modified button cap.
It is only connected to the data bus voltage.
The Relay Module
Containing two relays, this module can work as
- a switch for the lights,
- a relais for motors.
It has the capabiltiy to react on up to 16 different commands. These can be split between the relays as needed.
The size of the module allow a mounting inside a flush socket, even below the switch module.
The relay module has two supply connectors:
- The data bus voltage
- a separate supply voltage for the relays.
According EIB/KNX a standard wiring has four wires this is not a problem.
The Configuration Tool
This is a separate module to configure all other modules via the twisted pair wiring. It can be included into the power supply.
The configuration tool provide a wifi connection, therefore is an integration in other systems possible.
The Power Supply
As the data are modulated on the power supply voltage, a special power supply is needed. The nominal supply voltage for the system is 24V.