Description
Optical smoke detector with Modbus communication in the base, 24V. Automatic sensitivity adjustment and service alarm.
Description EVC-PY-DA-MB
Connect EVC-PY-DA-MB to a Modbus master that scans the Modbus registers in the smoke detector. Three status indications can be read from the smoke detector: Smoke detector, service alarm (contamination), and removed detector head. RS 485 termination (120 Ohm) is activated by a programming jumper on the circuit board in the base. Modbus ID (address), parity, and baud rate are set on the DIP switch. To reset a smoke detector, the power must be briefly interrupted. The detector is equipped with a bayonet fitting, making it easy to install and remove.
EVC-PY-DA features an intelligent monitoring circuit that continuously checks and adjusts sensitivity for optimal functionality throughout the detector’s entire lifetime. When the detector can no longer compensate for environmental influences, a service alarm is generated.
The design of the detector makes it almost completely immune to high air velocities, contamination, and radio frequency interference.
For more information about the smoke detector head, see the datasheet for EVC-PY-DA.