The Janus system from Yaham Optoelectronics shifts large-scale LED lighting management from simple on/off switching to full intelligent control — using the building's existing AC power lines as the communication backbone. This power line communication (PLC) approach, based on the DL/T645-1997 protocol with OFDM modulation at 315 kHz, means no separate RS485 cables, no wireless spectrum congestion, and no repeater infrastructure: every luminaire controller on the same electrical phase is inherently addressable.

What control functions does the Janus system provide?

The master controller — available in tablet, portable chassis, distribution cabinet, and wall-mount form factors — manages up to 400 sub-controllers, each driving up to 5 LED luminaires. Operators can perform global dimming of all connected lights, group-based zone dimming by time period, one-key scene switching between pre-configured lighting profiles, and fully automated schedule-based on/off/dimming. The system also logs energy consumption per period and provides automatic fault reporting — identifying failed luminaires without walk-around inspection — a significant maintenance efficiency gain in facilities with hundreds of high-bay fixtures.

Can the Janus system respond to environmental conditions?

Yes. Optional sensor inputs extend the system beyond scheduled control: motion/occupancy sensors activate lighting only when areas are in use (warehouse aisles, corridors), daylight sensors trigger automatic dusk-to-dawn switching for outdoor and perimeter lighting, and constant-illumination sensors continuously adjust LED output to compensate for changing natural light levels — maintaining target lux at the work surface while minimizing energy consumption. The system also supports 1–10V, PWM, and TIMER dimming interfaces for compatibility with third-party LED drivers.