ADDA AD0412HB C5B 12V 7800RPM dc Exhaust Fan For High frequency switching power supply and recorder Exhaust

 The fan with various functions are available, such as 3 wires Tachmeter signal output , Alarm signal output , Dual speed with Tachometer signal , Temperature control, PWM , 4 wires FG+Alarm function, Waterproof , USB cable, LED fan etc…

1.Soft-start

when power on the fan , the current is zero then begins to increase until reaching the maximum speed and rated current . The operating maximum current is equal to the freely running current(or in rare cases, rotor is stalled and then restart). The fan will reach the rated speed within 5-10 seconds.

2.Auto-start

Auto-start function will guarantee that the fan's auto-restart prevents from the blades being stalled. When rotor is stalled,the fan's current will low down to zero and then fan will restart after five seconds.

3.FG(Tachometer Signal)

The open collector will provide a square signal to drive the speed when it is connected a "pull-up" resistor and is powered by a voltage which is compatible with the input of the reading device . The maximum collector'voltage is up to 72VDC and the maximum collector's current is 10mA The power supply must have the same ground potential as the fan.

4.RD(Locked Rotto Signal)

This is an open collector function with the same hardware as the FG function. The output signal is Low electric level when fan rotates . And when fan Stalls ,output signal is High electric level.

5.PWM(Pulse Width Modulation)

PWM function can use frequency and high-low electric level to control the fan's speed . Frequency can be adjusted from 18KHz to 30Khz, High electric level is from 3V to 10V and Low electric level is <=0.8V.The control of fan's speed can be done by linearly adjusting "duty cycle" to reach maximum speed. CS (Constant Speed),SS(Soft Start function)and CL (Current Limit ) are included . PWM function's graph is as below.

6.Thermal Control

When this function is applied,the fan's speed is controlled by the temperature .Different temperature corresponds to different speed . CS (Constant Speed).SS(Soft Start Function)and CL ( Current Limited)are included . The principle is to utilize a thermal resistor to perform this function . The graph of common controlling way is as below;

Q : Can I have some samples for testing?
A : Yes, we can provide some samples to you for testing.

Q : Do you accept OEM/ ODM ?
A : Yes, we support OEM/ ODM service. Pls don’t hesitate to contact us.

Q : Can you provide different bearing types of the fan?
A : Yes, we can provide 2Ball bearing, Patent bearing and Sleeve bearing.

Q : What is the highest IP class you can provide?
A : The highest IP class of fan we can provide is IP67.

Q : Can you provide the fan with special function?
A : Yes, we can provide the fan with FG function , RD function , PWM or
Temperature control ..etc.