SN-3000-YG2-N01 Smoke Sensor - RS485 Modbus-RTU, 12/24V DC

The sensor uses a standard RS485 serial interface configured for the ModBus-RTU protocol. This allows multiple sensors to be daisy-chained on a single bus and integrated with PLCs, SCADA systems, or central fire alarm control panels for remote monitoring and alarm management.

The SN-3000-YG2-N01 supports a wide DC voltage range of 12V to 24V. You can connect it directly to a compatible DC power supply or to the auxiliary power output of a fire alarm control panel. Ensure polarity is observed when wiring the power terminals.

Yes, it features dual local alarm outputs. Upon smoke detection, a high-visibility red LED illuminates, and an integrated buzzer sounds (approximately 85dB). These provide immediate onsite audible and visual alerts in addition to the signal transmitted over the RS485 network.

The sensor is designed for ceiling mounting. Use the included screws to secure the base plate to the ceiling. The main sensor unit then twists onto the base. Ensure it is installed in locations with adequate air flow, away from direct airflow from vents, and in accordance with local fire safety codes for smoke detector placement.

The integrated metal insect-proof mesh protects the internal optical chamber from dust, insects, and other debris that could obstruct the sensing path or cause false alarms. This feature is critical for maintaining long-term reliability and reducing maintenance needs, especially in industrial or dusty environments.