DC Brushless Axial fan W40S12BMD5-07

High Airflow, Low Power Consumption And Long Lifespan

Characteristic Curve

1.Mechanical Specifications

2.Electrical Specifications

• Note1: The above standard should be the specified value at normal temperature(23°C) and normal humidity (60~65%) unless otherwise notice. As to the value of item 2-3~2-8, it should be measured after 10 minutes operation.
• Note2: In the case that power is turned on during fan rotor is locked, the fan shall attempt to restart at a typical repetition rate (Temperature rise will be prevented). The fan will automatically restart when the locked rotor condition is released.
• Note3: Power supply voltage must not be applied between signal output line and any other line directly. Reverse polarity protection is effective to just switch the positive and negative power line.
• Note4: Control signal(Blue lead wire) should be applied 2.97 V to 3.63 V, or should be open.
• Note5: 10.8 V~13.2 V operating voltage range is for continuous DC voltage. Power supply voltage ripple 5% maximum.
• Note6: The max value of current consumption does not represent the peak value.

3.Provision of Revolution Signal

3-1 Output of Revolution Signal

● Output type: open collector type
● Electrical specification

Remark: As for measuring V_OL , it is necessary to put cr low pass filter which is constructed of R1 and C1. The time constant of R1 x C1 is to be more than 24us such as R1=2.4 kΩ C1=0.01 uF.
● Absolute maximum specification   
           Collector current I_C=10 mA Max.
           Release Voltage V_OH= 15 V Max.

● Electrical characteristics
           Saturation Voltage V_OL = 0.8 V Max.
           At I_C=5 mA

● Output waveform

• Remark: At locked position, output becomes V_OH OR V_OL .
• T=T₁+T₂+T₃+T₄=60/N (Sec)   N: Fan Speed (min^-1)
• DUTY =T₁/T₁+T₂= 50±10%

⚠ CAUTION

Please be careful that revolution signal lead wire (Yellow wire) shall not have any voltage directly applied. (It should damage inner circuit.)

4.PWN Control

4-1 TYPE

● The method of active/inactive drive mosfet for speed control.

*Actual machine side is TTL/CMOS(OD/OC) PWM controlled.

• V_CONT is above 2.97 V ··· FAN should run full speed.
• V_CONT is below 0.8 V ··· FAN should run low speed.
• The wire of V_CONT is open ··· Fan should run full speed.
  Control signal should accept PWM control, PWM frequency is from 20 kHz to 30 kHz.

4-2 PWM CONTROL SIGNAL

● Signal voltage range: 0~3.63 VDC

• The frequency for control signal of the fan shall be able to accept at 20 kHz-30 kHz.
• PWM signal with 3.3 VDC TTL/COMS(OD/OC) level. The preferred operating point for the fan is 25 kHz, and duty cycle from 0% to 100%.
• If the PWM control wire connect to ground, the rotor will spin at low speed.
• At 100% duty cycle, the rotor will spin at maximum speed.
• If the PWM control wire open, the rotor will spin at maximum speed.

4-3 SPEED VS PWM CONTROL SIGNAL, AT RATED VOLTAGE

• Note: The standards should be the specified value at 23°C normal temperature(23°C) and normal humidity(60~65%), free air and 12 V, 25 kHz unless otherwise notice.

5.Special Test

5-1 VIBRATION TEST

• Standards for items 2-3~2-8 and 6-2 should be met after 30 minutes 0.2 mm amplitude, 55 Hz vibration in each direction: up-down, right-left, forward-back, in nonoperating condition.

5-2 SHOCK TEST

• Standards for items 2-3~2-8 and 6-2 should be met if the fans fall naturally from a height of 30cm in the packing box for each direction.
  *Dimensions of Packing Box (W x D x H) : 360 x 540 x 180 (mm)

6.Others

6-1 CONNECTION

6-2 LOCKED ROTOR

No damage shall be found for continuous 1 hour at locked rotor.

6-3 ⚠ CAUTIONS IN INSTALLATION OF FAN MOTORS

• Please consider system layout not to place any obstacles within 3mm from the fan housing edge of inlet side (Impeller side).
• In case of screwing the fan housing, flatness of installation surface should be max. 0.1, otherwise the housing may transform and interfere with the impeller.
• The fan should not get any impact or vibration during rotation. when vibration or impact is applied to the fan during rotation. The fan may break by interfering with
  obstacle in the system.
• Please fix the fan in the system so that it will not rattle. Vibration of the fan may cause contact between the fan and the system, which will generate noise.
• Please do not place any obstacle near outlet and inlet side of the fan.
• Placing obstacles near the fan may deteriorate air flow.
• It may cause cooling performance reduction as well as fan motor life deterioration due to heavy load on the bearings.
• For any usage that does not meet above conditions, please evaluate at user's side or consult with us.

6-4 ⚠ USAGE OF FAN MOTOR

• Please do not put resistors or other electronic components on the extension of the fan motor lead wires for the purpose of fan motor speed reduction.
• It may make the voltage to the fan fluctuate and become lower than lower limit of operating voltage range.
• In this case, there may be such failures like no start or unstable rotation of fan motor.
• Please do not plug in or plug out the connector when the power is on. it may damage the fan.

7.Special Items

7-1 WARRANTY

• Our warranty is limited to the replacement of failed fan at free of charge, if and only if the failure is found within two years after it was shipped out from our production facility and if the cause of the failure is proven to be attributable to the supplier.
• Our liability does not extend to the consequential damages caused by the failed fan.

7-2 NOTE

Please consider having an independent protection system in the customer's instruments in the event that the fan should stop operating.

7-3 POWER SOURCE

Brushless DC fans are designed to be used at DC power source with bypass capacitor. We would recommend you to use DC power source which is filtered ripple and noise.

• Fans are designed to perform as expected when stable voltage is supplied. 
• Fluctuation of the voltage between Vcc(+) and GND while the fan is powered must be within the specified operating voltage range.
• Fluctuation cycle of the voltage between Vcc(+) and GND while the fan is powered must be longer than the fan's rotation cycle.
• GND of the fan must be kept below the voltage of its Vcc(+) when the voltage is switched ON/OFF or the fan is not running. 
• Devices that use the fans are supposed to be designed so that the voltage applied on the revolution signal is not affected by power ON/OFF.

7-4 ENVIRONMENT-RELATED SUBSTANCES

Based on RoHS3, cadmium, lead, mercury and compound of these substances and hexavalent chromium compound, Polybromo bi-phenyl(PBB) and polybromo di-phenyl ether(PBDE) are not included in this product

8.Outline Dimensions

 (Unit: mm)