DC BUS technology merge Data over existing Direct Current (DC) power lines, like those used in every vehicle implemented in small silicon devices.
The uniqueness of the technology is the use of existing protocols such as UART, LIN, CAN bus for communication and the ability to mitigate with the hostile and noisy environment.
The cable length depends mainly on the impedance of loads connected to the power line in the frequency range of 10MHz.
A 10A motor is a small load (inductive), but a capacitor of 10nF is a high load. A reasonable distance is between 20m to 100m. The lower impedance power line will reduce the communication distance further more.
The SIG family transfer UART bytes over the power line byte by byte. Any number of bytes can be transferred. The modulation is multiple phase modulation. When operating as a network, a master-slave protocol such as LIN can be used.
The DCB family of devices are message oriented. The devices get a message of any length and transfer it over the power line to the receiving devices. The DCB family has CSMA/CR mechanism for network operation.
The interface with its ECU is via CAN, UART or SPI protocols.
The SIG family of devices operate up to 115.2Kbps. The DCB1M operates up to 1.4Mbps.
Yes. Two or more data buses can operate over the same power line using different carrier frequencies.
The DC-BUS devices were designed to operate on ordinary wires. Using low capacitance wire such as twisted pair cables, UTP improve the effective communication length and performance.