Техническая Спецификация для Sepa MFB40H12 12 Vdc DC brushless fan, axial fan 120 l/min 514082000

• ALARM SIGNAL (Option ...A) 
 
The  SEPA

  MFB40H12XA includes a speed impulse output, which enables monitoring the correct 

function of the fan. An alarm-board is available on request. 

 

The pulse is like a rectangular wave. The pulse frequency correlates to 2 x rotor speed, OC-output, a pull-
up-resistor is needed. At blocked rotor the output signal could be L (

≤0.5V) or H (Vcc).  

 

IMPORTANT: The pulse output is not  protected against short circuit and must not connect to GND or 
Vcc without series-resistor. Do not connect not used pulse output to GND or Vcc (insolate). 

 

 
 
 
 
 

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blk

 

yel

 

red

 

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FAN

 

 

T

1n

 

OUTPUT WAVEFORM 

Run: L=0.5Vmax; H=Vcc; 

 

T

(12LA)

=7.5msec, T

(12A)

=4.9msec, Stop=H/L

MFB40H12xA

 

ALARM CIRCUIT

 

(Vce<15V, Ic<5mA)

 

 
 
• ACCESSORIES: 

 

VARP01 

Speed control via temperature 

Connector On 

request 

 
 

 
IMPORTANT: Do not touch the rotor! 
 
 
• ELECTRICAL PROTECTION:

 

 
The MFB40H12xA is permanently protected against false pole of power supply and blocking rotor. 
 
• ORDER INFORMATION:

 

 
MFB40H12L 

SEPA fan, Ball Bearing, CE 

(on request) 

514082100 

MFB40H12LA 

SEPA fan, Ball Bearing, 

(on request) 

514082110 

MFB40H12 

SEPA fan, Ball Bearing, CE 

(Standard model) 

514082000 

MFB40H12A 

SEPA fan, Ball Bearing, 

(Standard model) 

514082010 

 
 
 
 
 
 
 
 
 
 
 
 
 

 is the brand name for fans and CPU-Coolers, made by Nippon Keiki Works LTD., Tokyo 

 

 EUROPE GmbH 

D-79108 FREIBURG 

Tel: +49(0)761/1561025      Fax: +49(0)761/1561027

 

02/07 

 

Technical changes without notice