- SIG Family
- DCB Family
- 🌐 LANG
The DC-BUS technology enables network power line communication of Data, Voice, Music and Video by digital means over Direct Current (DC) battery power lines.
Yamar’s unique technology enables advanced digital communication in hostile and noisy environments such as on vehicle battery lines in a small size silicon device. Customers integrate the devices into modules utilizing their own application (e.g. within body and power train modules for in-vehicle multiplex communication networks). The DC-BUS is used in many non automotive applications too.
The same power line can be used for multiple independent networks by using different carrier frequencies.
Any of Yamar's PLC devices is coupled to powerline using a small footprint DC blocking capacitor, typically 2.2nF. The Ccoupling voltage rating depends on the powerline voltage and its expected impulses.
Any Power-supply has a filtering capacitors at its DC inputs. These capacitors attenuate strongly the PLC device carrier signal. It is recommended to add an inductor (>22uH) or ferrite bead (>100Ω @ 5MHz-30MHz) in series to the power-supply connection to the DC powerline to reduce the carrier signal attenuation.
The cable length depends mainly on AC loads impedance connected to the power line. A 10A motor is a small load, but a filtering capacitor of 10nF is a high load.
Yamar's proudct lines have selectable carrier frequencies in the range of 5MHz to 30MHz with TX output level of 1Vpp/2Vpp. and sensitivity of ~10mVpp. A typical distance is up to 100m.
For more application specific information, you can contact our support team.
Yes! it's possible to couple to AC power lines using two capacitors, one for the phase and one for the return.
It is recommended to realize the communication network over a known point-to-point dedicated AC power line.
For more details see: TRANSFERRING UART/LIN/CAN/SPI/DMX/RDM OVER AC POWER LINES
The SIG family devices transfers UART/LIN bytes over the power line (Byte oriented transceiver). The data bytes are transferred each one separately over the power line with a fix latency of 2.5/4 bits. Any number of bytes can be transferred. The modulation is multiple phase shifts QPSK. When operating as a network, a master-slave protocol such as LIN can be used.
The DCB family devices are message oriented device. A message of any length is constructed into powerline frame/s and transferred over the power line to the receiving devices. The DCB family has CSMA & Arbitration built-in mechanism for multi-master network operation. The DCB family devices enables seamless interfacing to UART/SPI/I2C/CAN protocols.
There is no physical limitation for the number of nodes, but in practice 16-32 nodes is a reasonable number.
Yamar's powerline communication (PLC) transceivers can interface with UART/LIN/CAN/SPI/I2C protocols. The idea is to enable seamless interfacing, proving a transparent physical layer to an existing common communication protocols. The integration of Yamar's PLC ICs is quick and simple, allowing plug & play solution for any application.
The SIG family devices operates up to 115.2Kbit/s. The DCB family devices operates up to 1.4Mbit/s.
Yes. Two or more data buses can operate over the same power line, each using different carrier frequencies. The SIG60 and SIG61 have 7 selectable carriers. The SIG100, SIG102, DCAN500 DCB1M, and DMX250 have 251 selectable carriers.
Each network's carrier frequency shall be selected with the minimal spacing specified (see datasheets) and asymmetric selection (harmonic-wise).
For example, for the DCB1M minimum spacing is 1.5MHz, then the user can select 5MHz, 7.3MHz, 13.7MHz, etc.