Product Data Sheet 255/2H Product Data Sheet 255/2H The engineer's choice
Product Data Sheet 255/2H 255/2H INDEX 1 General ...................................................................................................................................................................... 3 2 Mechanics ................................................................................................................................................................. 3 2.1 2.2 3 Operating Data ......................................................................................
Product Data Sheet 255/2H 1 General Fan type Rotating direction looking at rotor Airflow direction Bearing system Mounting position - shaft 2 Mechanics 2.1 General Width Height Depth Mass Housing material Impeller material Max. torque when mounted across both mounting flanges Screw size 2.
Product Data Sheet 255/2H 3 Operating Data 3.1 Electrical Operating Data Measurement conditions: ∆p = 0: I: Features Voltage range Nominal voltage Power consumption Tolerance Current consumption Tolerance Speed Tolerance Normal air density = 1,2 kg/m3; Temperature 23°C +/- 3°C; Motor axis horizontal; warm-up time before measuring 5 minutes (unless otherwise specified). In the intake and outlet area should not be any solid obstruction within 0,5 m. corresp. to free air flow (see section 3.5) corresp.
Product Data Sheet 255/2H 3.2 Operating Data - Electrical Interface - Output Tacho type Features Tacho operating voltage Tacho signal Low Tacho signal High Maximum sink current External resistor Tacho frequency Tacho isolated from motor Slew rate /2 (open collector) Note UBS US low US high Isink Values <= 30 V I sink: 2 mA <= 0,4 V I source: 0 mA <=30 V <= 2 mA External resistor Ra from UBS to US required. All voltages measured to GND.
Product Data Sheet 255/2H 3.3 Electrical Features Electronic function Reversed polarity protection Max. residual current at UN Locked rotor protection Locked rotor current at UN None Impedance IF <= 5 mA Impedance protected Iblock approx.
Product Data Sheet 255/2H 3.4 Aerodynamics Measurement conditions: Measured with a double chamber intake rig. Normal air density = 1,2 kg/m3; Temperature 23°C +/- 3°C; In the intake and outlet area should not be any solid obstruction within 0,5 m. The information is only valid under the specified test conditions and may be changed by the installation conditions. If there are deviations from the standard test conditions, the characteristic values must be checked under the installed conditions. a.
Product Data Sheet 255/2H 3.5 Sound Data Measurement conditions: Sound pressure level: 1 meter distance between microphone and the air intake. Sound power level: Acc. to DIN 45635 part 38 (ISO 10302) Measured in a semianchoic chamber with a background noise level of Lp(A) < 5 dB(A) For further measurement conditions see section 3.5 a.) Operation condition: 12.
Product Data Sheet 255/2H 5 Safety 5.1 Electrical Safety Dielectric strength DIN EN 60950 (VDE 0805) and DIN EN 60335 (VDE 0700) A.) Type test Measuring conditions: After 48h of storage at 95% R.H. and 25°C. No arcing or breakdown is allowed! All connections together to ground. B.) Routine test Measuring conditions: At indoor climate. No arcing or breakdown is allowed! All connections together to ground. Isolation resistance Measuring conditions: After 48h of storage at 95% R.H.
