| | | • ALARM SIGNAL (Optional) The SEPA® MFB25AxxA includes a pulse output, which allows monitoring the correct function of the fan. An alarm-board is available on request. The pulse is like a rectangular wave, the frequency correlates to 4 x rotor speed. The amplitude is more than operating voltage and peaks up to 9 x operating voltage appear periodically. Please use a series resistor and a Z-diode to block up the high voltage. At blocked rotor the output signal could be L (<0.9V) or H (Vcc -0.9V). IMPORTANT: The pulse output is not protected against short circuit and must not connect to GND or Vcc without pre-resistor. A pull-up-resistor is not needed. Do not connect not used pulse output (insulate). Do not touch the rotor! | | |
| | | MFB25A05 SEPA® Miniature fan 30x40x10mm, ball bearings, CE 512511000 MFB25A05A SEPA® Miniature fan 30x40x10mm, ball bearings, pulse, CE 512511010 MFB25A12 SEPA® Miniature fan 30x40x10mm, ball bearings, CE 512512000 MFB25A12A SEPA® Miniature fan 30x40x10mm, ball bearings, pulse, CE 512512010 | | |