RL4 smoke detector

The smoke detectors for ventilation ducts RL4 basic and RL4 pro are used to detect smoke in round and square ventilation ducts.

Implementation of control scenarios

The RL4 basic and pro smoke detectors enable the control of fans and can be used as part of building management systems or fire alarm systems. This allows necessary and effective control scenarios to be implemented at an early stage to prevent smoke from spreading to other fire compartments. In addition, the RL4 basic and pro smoke detectors have VdS approval.

The RL4 basic smoke detector for ventilation ducts and the RL4 pro smoke detector, which is equipped with additional convenient features, offer many features that clearly distinguish them from conventional duct smoke detectors.

Advantages of the RL4 basic smoke detector

• Position and air direction independent installation
• Time-saving and tool-free access to the smoke switch for quick function testing.
• Flexibility thanks to minimal installation distance of 1.5x hydraulic diameter in front of and behind interference points
• Encapsulated evaluation electronics protected against contamination by design
• Universal power supply for 230V AC or 24V AC/DC with automatic detection
• Cable gland with strain relief for up to 7 connecting ducts
• TEST/RESET function directly on the device and controllable externally via GLT interface
• Protective screen prevents coarse soiling and extends the service life of the smoke switch
• VdS approval G 221008

Additional advantages of the RL4 pro smoke detector

• LCD display simplifies diagnosis, display and setting of operating parameters
• Galvanically isolated RS485 interface with support for BACnet MS/TP or Modbus RTU protocol
• Integrated flow monitoring via flow sensor
• Visualization of the contamination wheel via LED display

Note: For both product variants, replacement of the smoke switch is recommended after 8 years of operation.