D285DH Duct smoke head, 2-/4-wire, 12/24V

Commercial Type No.: D285DH
Product No.: 4.998.140.344

D285DH Duct smoke head, 2-/4-wire, 12/24V
  • Commercial or residential applications
  • Two-wire or four-wire application, depending on base
  • Chamber Check rapid-flash LED Automatic Trouble Indication reports contaminated chamber
  • Flashing LED power indicator
  • Steady-On LED alarm indicator
  • Modular design
  • Details
    RMS Ripple (maximum) 25% of DC input
    Voltage (input) Two-wire: 8.5 VDC to 33 VDC Four-wire: 10 VDC to 30 VDC
    Current
    Alarm Two-wire: depends on control panel which must limit the alarm current to 100 mA maximum Four-wire: depends on detector base, refer to pertinent base specifications
    Standby Two-wire: 0.08 mA at 12 VDC, 0.09 mA at 24 VDC Four-wire: 24 mA at 12 VDC or 24 VDC
    Relative Humidity: Up to 93%, non-condensing
    Temperature (operating): +32°F to +100°F (0°C to +38°C)
    Radio Frequency Interference (RFI) Immunity: No alarm or lockup on critical frequencies in the range from 26 MHz to 950 MHz at field strengths less than 50 V/m
    Color: Bone white
    Dimensions (diameter x D): 4 in. x 1.25 in. (10.2 cm x 3.2 cm)

    Images

     
  • Certificates (3)
    Title Type Language
    CSFM PDF
    MSFM PDF
    HKFSD PDF
     
  • Documents (2)
    Title Type Language
    Data Sheet PDF
    Installation Manual PDF
     
 

Accessories

D340 Duct detector housing, 2-wire

D340 Duct detector housing, 2-wire

Two‑wire duct detector housing for the D285DH Duct smoke head. Use with compatible control panels.

Commercial Type No.: D340
Product No.: 4.998.113.252

 
D341 Duct detector housing, 4-wire 24/120V

D341 Duct detector housing, 4-wire 24/120V

Four-wire duct detector housing that works with all 24 VAC/VDC or 120 VAC UL Listed four‑wire control panels.

Commercial Type No.: D341
Product No.: 4.998.113.250

 
 
D342 Duct detector housing 4-wire 24/220/240V

D342 Duct detector housing 4-wire 24/220/240V

Four-wire duct detector housing that works with all 24 VDC or 24 VAC, 220 VAC, or 240 VAC UL Listed four‑wire control panels.

Commercial Type No.: D342
Product No.: 4.998.113.254