System Sensor D4120A 4-Wire Photoelectric Low-Flow Duct Smoke Detector, 24VDC/120VAC

Photoelectric, integrated low-flow technology
• Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s
to 20.32 m/sec)
• Versatile mounting options in square or rectangular
configuration with modular construction
• Plug-in sensor offers superb false alarm immunity and
the latest sensor technology
• Broad ranges for operating temperature (-4ºF to 158ºF)
and humidity (0% to 95% non-condensing)
• Patented sampling tube installs from front or back of the
detector with no tools required
• Increased wiring space with a newly added ¾ inch
conduit knockout
• One 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
• Two DPDT Form-C relay contacts
• 24 VAC/DC or 120 VAC
• Backward compatibility with existing Innovair products,
including remote accessories