MSD 523 photo optical smoke detector/MS USB 502-6

MSD 523 optical smoke detector features digital signal processing and intelligent evaluation
logic, and offers excellent response behaviour with minimum false alarm rates.

Technical specifications:

• Rated voltage: 24 V DC
• Current consumption at 30 V: idle: max. 120 μA
  alert: min. 19 mA, max. 22.5 mA
• Perm. voltage range: 18 V DC – 30 V DC
• Supply cable requirement: 2 x 2 x 0.8 mm²
• Alert criterion: Current increase, 2-conductor technology
• Dimensions: 118.8 mm diameter x approx. 68 mm incl. base
• Weight: 125 g
• Monitored area: max. 150 m²
• Installation height: max. 16 m
• Perm. airspeed: max. 20 m/s
• Ambient temperature: -25 °C to +60 °C
• Ambient conditions: Humidity (permanent, no condensation): 
  at ≤ 34 °C: 10–95 % rel. hum., at > 34 °C: max. 35 g/m³, min. 10 % rel. hum.
• Protection category: IP 44
• VdS approval: G207123
• CPD certification: 0786-CPD-20330