D²B
D²B ( Domestic Digital Bus , IEC 61030 ) is an IEC standard for a slow multi-master serial bus for home automation applications. It was originally developed by Matsushita and Philips in the 1970s. The D²B forms a topological ring structure with one master and several slave devices. The sequence of the slave devices is stored in the master device; if the master device is replaced by another, this generates an error as long as this sequence has not been saved in the new master device.
The successor to the D²B is the MOST bus with a larger data width and a higher transfer rate. This has almost completely replaced the D²B.
properties
- Bus type: fieldbus
- Topology : ring
- Master device: 1
- Slave devices: 61
- Speed: 5.65 Mbit / s when using an optical polymer fiber = glass fiber (D2B optical)
Applications
- The 1998 version of the SCART standard offers a D²B connection for communication between video devices.
- In various Mercedes-Benz vehicles, the audio and video equipment communication is based on the D²B.