Cooling Fan / DC Cooling Fan

This DC fan material is high quality and special (for example, it has copper inside leaves, so it works very stable and slience...), and it has a brain---programme chip on PCB, controls DC fan's work: the air flow will be bigger and bigger when temperature increases,
and when it cooler, the speed will slow down --- this way to protect machine and save
energy.Spec information
DC diagonal compact fan (sickled blades)Technical featuresDimensions172Ø x 51 mmGeneral descriptionDiagonal fan with low noise when there is a high pressuresaddle curve. Very rigid compression curve for highcounterpressure. Electronic commutation completelyintegrated.CharacteristicsElectronic commutation external engine with blockingprotection and wrong pole protection.Air achievement within the permissible voltage range adjustably. Overload protection restart after 3 seconds. Alarm exit / Open Collector / low aktivDirection of rotation reversal (N.C or <0,8 V normal,5V 50V Revers)Coil and electronics fully recast.Connection lineSingle strands AWG 22, TR 64, bared and tin-plated.Cable length: 4.500 mm +/-10 mmAlarm exit V max 40VDCI max 20mA low >=0,4V at 2mAAlarm informationsThe alarm exit becomes active (with a delay of some seconds), if the exhaust turns more slowly than 75% of the target number of revolutions given at the control inlet.Direction of protectionLeft, looking at rotorDirection of air flowAir exhaust over barsBearingBall bearingsLifetime L10 at 40°C65000 hWeight/Mass0,820 kgHousing materialAluminium. Housing with grounding lug for screwM4 x 8 (TORX). 48 V version including screws.Material of impellerFiberglass-reinforced PA plasticDC diagonal compact fan (sickled blades)Nominal dataNumber of revolutions controllV0 .10Nominal voltageVDC48Nominal voltage rangeVDC40 55Power inputW85Power input 2A1,75Min. ambient temp.°c-20Max: ambient temp.°c60Sound pressure leveldB(A)69Sound power levelB7,8Speedmin¯¹5520Max. Air flowm³/h700(Air exhaust over bars)Air flow at p=200Pam³/h510(Air exhaust over bars)Air flow at p Max=500Pam³/h0LeadDescriptionRedplus 48 VDC (+Return)BlackGND 0V (-48VDC)BrownSpeed controlOrangeSpeed directionYellowalarm output (/17)