| • ALARM OUTPUT The SEPA® HYB35C05A 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 3 x rotor speed. At blocked rotor the output signal could be L or H (L=0.5Vmax, H=2.5Vmin). IMPORTANT: The pulse output is not protected against short circuit and must not connect to GND or Vcc without series-resistor. A pull-up-resistor is not needed. Do not connect not used pulse output to GND or Vcc (insolate). |