FB-K4 fan unit

Fan unit FB-K4 is a product of optical transport platform "GORIZONT". GORIZONT equipment is used in the unified telecommunication network of the Russian Federation as a receiving device for digital fibre-optic transmission lines. The GORIZONT equipment supports the technology of dense spectral channel densification (DWDM) and protocols of optical transport networks OTN. FB-K4 fan unit provides air cooling of HORIZONT platform plug-in units installed in K4-H8 or K10-H8 frames. It has inbuilt protection against incorrect polarity of input voltage, controls values of air flow temperature and fan speed. Controls the speed of rotation separately for each fan by means of PWM