Three types of DC fan sensors are available: Locked
Rotor Signal; Tachometer Signal; and Life Signal. The Lock Signal,
which outputs the status of the fan motor, is ideal for detecting if
the fan motor is rotating or is stopped. The Tachometer signal is
set to produce two cycles of rectangular waveform as the fan motor
makes one rotation, thus providing an ideal sensor for detecting
speed. The Life signal is ideal for detecting a reduction in
fan speed at a specified RPM level. (Please place the mouse cursor over each item to show a diagram)
Output Circuit/Alarm Signal Circuit
Lock Signal
Tachometer Signal
Output
Circuit: Alarm Signal Circuit
Output Circuit:
Open Collector
Specification
Vce max
:
+30V
Vce max
:
+15V
Ic max
:
5mA(Vce(sat)max=0.4V)
TTL output is an available option.
Alarm Signal Circuit
Alarm Signal Output: White, +:Red, -:Black
Output Circuit: Open Drain
Specification
VDS max
:
+27.6V
ID max
:
5mA(Vo(LOW)max=0.5V)
Alarm Signal Circuit
Lock Signal
Output Waveform : At Rated Voltage
This Fan Motor has Three Lead Wires Output Signal:
White, +:
Red, -:
Black
The output signal may correspond to Case 1 or Case 2. Your design should provide for both waveforms.
Output
Circuit: Alarm Signal Circuit
T=T1+T2+T3+T4=1 Rotation, T1=T2=T3=T4=60/4m m: Rotation
Speed min-1