Depending on the system, there are different options for transmitting control information (signal transmission), but some smart home systems can also be operated with different types of communication:
- Twisted pair: The most common method of signal transmission works via wiring of the components as a twisted, two-core bus cable. These are operated with low, harmless voltages of 12 to 24 volts (safety extra-low voltage SELV).
- Powerline: the control signal is transmitted via the 230V cable network of the "normal" electrical installation.
- Radio: Control signals are transmitted by radio. Wireless systems are suitable for new buildings and especially for retrofitting existing buildings.
In addition, there are various system-specific communication options, e.g. a special form of powerline technology from the manufacturer LCN or transmission via fiber optic cables.
Source: bauwion
