System Sensor D4120

System Sensor InnovairFlex D4120 4-Wire Photoelectric Low Flow Duct Smoke Detect

System Sensor D4120

The InnovairFlex D4120 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 - 4000 fpm, temperatures of –4 to 158 deg F and a humidity range of 0 to 95% (non-condensing). A plug-in sensor head offers improved false alarm immunity and simple installation, testing and maintenance. An improved cover design isolates the sensor head from the low-flow feature for simple maintenance. The InnovairFlex housing provides ample wiring space, a 3/4 inch conduit knockout and built-in short circuit protection to prevent damage to sensitive components during installation. High contrast terminal designations make wiring easy. With its 2:1 sensor-to-power capability, the power board of the D4120 may be used to monitor a second sensor, D4S, simultaneously (i.e., supply and return side). As many as 50 InnovairFlex detectors can be interconnected. When one unit senses smoke, all interconnected detectors will switch their relays; only the detector sensing smoke will go into alarm, thus pinpointing the fire source. An easy-access test/reset button makes it possible to test the unit with the cover on. Three DIP switches can be used to configure field selectable settings: cover tamper delay, number of sensors to be controlled and shut down on trouble option. Each power board has 2 LEDs that can be used to indicate the status of connected sensors and a quick reference imprinted on the cover explains the LED status indications (standby, maintenance, trouble and alarm). The InnovairFlex duct smoke detector can be customized to meet local codes and specifications without additional wiring. The new InnovairFlex product line is compatible with all previous Innovair models, including remote test accessories.

Air Flow Velocity       :      100 - 4000 fpm
Alarm Current      :      65 milli-amp at 24 VDC, 135 milli-amp RMS at 24 VAC 60 Hz, 35 milli-amp RMS at 120 VAC 60 Hz
Alarm Response Time      :      15 sec
Brand Name      :      System Sensor
Capacitance      :      270 micro-F
Contact Rating      :      2 amp at 30 volt DC Resistive (SPST), 10 amp at 30 volt DC Resistive, 10 amp at 250 volt AC Resistive, 1/2 hp at 240 volt AC, 1/4 hp at 120 volt AC (DPDT)
Humidity Rating      :      0 - 95% RH
Item Name      :      Duct Smoke Detector
Maximum Standby Current      :      21 milli-amp at 24 VDC, 65 milli-amp RMS at 24 VAC 60 Hz, 20 milli-amp RMS at 120 VAC 60 Hz
Power Supply      :      20 - 29 VDC, 120/24 VAC
Power Up Time      :      35 sec Maximum
Reset Time      :      0.6 sec Maximum
Reset Voltage      :      3 VDC Minimum at 20 - 29 VDC, 2 VAC Minimum at 24 VAC, 10 VAC Minimum at 120 VAC
Size      :      14-3/8 Inch Length x 5 Inch Width x 2-1/2 Inch Depth (Rectangular), 7-3/4 Inch Length x 9 Inch Width x 2-1/2 Depth (Square)
Sub Brand      :      InnovairFlex
Temperature Rating      :      -4 to 158 deg F Operating, -22 to 158 deg F Storage
Type      :      4-Wire, Photoelectric, Low Flow
  • 4-wire photoelectric, integrated low-flow technology
  • Versatile mounting options - square or rectangular configuration
  • Plug-in sensor offers superb false alarm immunity and the latest sensor technology
  • Patented sampling tube installs from front or back of the detector with no tools required
  • Increased wiring space with a newly added 3/4 Inch conduit knockout
  • 1-easy-access test/reset button and improved LED status
  • Patented interconnect feature for multi-fan shutdown
  • New high contrast terminal designations
  • Built-in short circuit protection from operator wiring errors
  • Field selectable settings for configuring the detector
  • 2 DPDT form-C relay contacts
  • Backward compatibility with existing innovair products including remote accessories