Fan 3rd Wire Signal
Safety Certification
02
Fan with switching driving circuit designed for rpm
measurement:
These fan motors have three lead wires:
+:Red,
-:Black,
output signal for 3rd wire:
F Type : Yellow
R Type : White
The relationship between rotation & output
pulses signal from 3rd wire are as follows:
(a) 1 Rotation=2 Pulses(4 poles' motor)
(b) 1 Rotation=3 Pulses(6 poles' motor)
(c) 1 Rotation=4 Pulses(8 poles' motor)
Notice:
For 8 poles' motor: normally,
1Rotation=4 pulses, if frequency divided
circuit is implemented in this motor then
1Rotation=2 pulses.
R Type (Rotation Detector)
F Type (Frequency Generator)
DC FAN Red(+)
3 rd wire
Black(-)
Customer's Circuit
Vcc
Ic RL
Run Locked
Vcc
1Pulse
1Rotation
Run Locked
a
b
c
DC FAN Red(+)
3 rd wire
Black(-)
Customer's Circuit
Vcc
Ic RL