MODBUS Smoke Detector

1．Power-on reminder: After the alarm is powered on, the indicator light flashes once, and the buzzer sounds once to indicate that the power has been turned on.

2．Self-test: When the test button is pressed manually, there will be sound and light alarm, and the alarm register will not update the data. After the manual test is completed, there is no need for remote power-off reset. When the self-test button is released, the sound and light alarm will automatically resume.

3．Smoke alarm: Under normal circumstances, the indicator light of the alarm will automatically flash once every 40 seconds. The alarm automatically detects the smoke concentration in the surrounding environment every certain time (about 1 second). If the smoke concentration is close to the alarm threshold, the alarm starts to perform intelligent calculation. If the operation result reaches or exceeds the alarm threshold, the alarm will start sound and light alarm, and update the alarm register data and the historical total alarm times data. When the smoke concentration in the surrounding environment drops below the alarm threshold, the alarm will automatically resume normal operation. The alarm register data and the historical total alarm times data can be obtained through 485 communication.

4．Output: RS485/MODBUS-RTU communication protocol. Default address 1, default baud rate 9600bps

SPD-668D has a good detection to visible smoke produced by slow vulva

or bright combustion. It’s widely used in indoor environments such as residential, shopping malls, hotels and warehouses. It's RS485 output, easy to connect to the third party monitoring system.

Q: Does it contain battery?

A: No. It's powered by DC power.

Q: What's the power supply?

A: It can be powered by DC9~360V. Others voltage can be cutomized.

Q: How to connect to the third party monitoring system?

A: It's RS485 output, support MODBUS-RTU communication protocol. It can be connect to the third party monitoring system as long as it support MODBUS protocol.