Locked Rotor Alarm Signal Output (yellow wire lead): Under normal conditions a locked rotor alarm signal outputs a constant signal frequency... if the fan stops spinning or "locks", it then outputs a "LOW" condition signal. If the fan starts spinning again, the "LOW" condition signal will go away.
 
Features:
 
Dimensions: 60 x 60 x 15mm (2.36 x 2.36 x 0.59")
Mounting Center: 50mm (1.97")
Rating: 12VDC
Current: 0.16 Amps
Power: 1.92 W
Bearing: Sleeve
Speed: 3800 RPM
Noise: 30 dBA
Max Air: 20.22 CFM
Max Pressure: 3.1 mmH2O
Temperature: -10 to +70 C
Hours: 20000-30000
Termination: Wire leads
Weight: 35g
Impeller: Glass fibre reinforced plastic 94V-0 PBT
Frame: Glass fibre reinforced plastic 94V-0 PBT