3. Fan cover with filter insert (for DC and AC fans)

ASEN68002

For 60 x 60 Series

ASEN18002

50

60

6.4

4.5 dia.

ASEN88002

For 80 x 80 Series

71.5

83.6

10

3.8 dia.

ASEN98002

For 90 x 90 Series

82.5

96.5

10

3.8 dia.

ASEN18002

For 120 x 120 Series

104.8

123.7

10.7

4.5 dia.

Fan lock sensor: operation details

DC Fan sensor output

In the ASFN series, the models designated "with lock sensor" have an additional output. If the fan propeller is blocked, a

rectangular alarm signal is triggered at the sensor output. This signal can be used with an external circuit in order to monitor

the fan - for example, to keep it from overheating.

› 1. Sensor output switch action

Notes:

1.) Output may be high for approximately 0.5s when power is turned on.

2.) In case of fan blockage, the sensor signal is at a constant high.

VOH

VOL

0V

s

ca. 5s or less

ca. 5s or less

Fan running

Fan running

Fan idle

(blockage)

Vcc

Ic

R

Red

White

Black

Operating

voltage

Operating

voltage

Sensor output

• Sensor output:

• Vcc:

• Ic:

Transistor (open collector)

Max. 30V

Max. 5mA

Notes:

1.) Set the resistance (R) at a value which ensures that the sensor circuit current (lc) does not

exceed 5mA.

2.) If the sensor output is operating at the TTL level, the sensor circuit current (lc) should be

approximately 2mA.

› 2. External circuit

Fan

External circuit

18 FAN LOCK SENSOR