How to control LED Networks over the DC powerline
Many LED lighting networks use dedicated data cables or wireless communication. Commonly used protocols are DMX-512/RDM, Dali as well as wireless Bluetooth, WiFi, and ZigBee.
Lighting modules require power cables for their operation, then using the powerline for also data communication is an obvious solution, isn’t it?
The DC Powerline communication solution (PLC)
Yamar developed unique semiconductors (ICs) for data communication between multiple LED modules over the existing DC power lines, eliminating the need for any control wiring. The ICs communicate using common protocols (DMX/RDM, UART, SPI) allowing quick and easy implementation.
Figure 1 depicts a typical LEDs network consisting of a DC-power-box and multiple LED modules.
The power box provides power and data (PWM) through dedicated wires. The LED module consists of a data transceiver, uC, and LED driver.
The SIG102 powerline transceiver devices communicate as a data network between the power-box and LED modules, eliminate the twisted pair data wiring, RS232/RS485 transceiver, and the LED's uC using its built-in PWM ports as depicted in Figure 2.
Figure 3 depicts the existing DMX light network layout. Aside from the AC/DC powerline that powers the DMX modules between the Master and the Slaves, multiple long DMX data cables (RS485) are daisy-chained between the lights for the DMX512 communication.
Figure 4 depicts DMX over powerline light fixture implementation, where both power and DMX data is combined over the powerline, eliminating the DMX cabling, using Yamar's DMX250 devices