3412N/37GV

3412N/37GV DC Axial Fan 25mm low profile fan with alarm output. The DC drive employs an electronically commutated external rotor motor with high efficiency. An highly integrated IC implements electronic motor commutation and the control functions of the fan. Drive electronics are completely integrated into the fan hub. Features General Data • Nominal voltage V DC 12 Voltage range V DC 8 .... 12,6 • • • • • Electronical protection against reverse polarity, locked rotor, and overloading. °C 30 50 Nominal speed min-1 1600 2700 Integrated alarm output signal when fan speed decreases alarm trip speed. Max. airflow m3/h 50 84 Max. airflow CFM 29,4 49,4 Electrical connection via 4 leads, 310mm, AWG24 Noise free air dB(A) 16 32 Current consumption mA 130 205 Power consumption W 1,55 2,5 Perm. Ambient temperature °C -20 ... +65 Service life (40 °C) h 70.000 Service life (70°C) h 40.000 Air exhaust over struts. Rotational direction CCW looking at rotor. Extremely low EMI. Speed control by temperature sensor (temp.1=30°C; temp.2=50°C) Temperature control at max. voltage Patents granted or applied for. Approvals UL, CSA, VDE Fan housing / impeller PBTP / PA Bearing system Mass All data are mean values at nominal voltage. ebm-papst St. Georgen GmbH & Co KG Page 1 / 2 Sleeve bearings g 100 Subject to technical change. 3412N_37GV.DOC 06.03.2008 Electrical connection Operating voltage U(+) according to admissible voltage range. Alarm supply voltage Uba ≤ 30V. All voltages related to „Ground“. (External pull-up resistor (Ra ) is needed. red Temp.U(+) blue 0V Ground control white Ra Isink Uba Ua Uba Isource Temperature control Alarm Circuit This fan is equipped with an integrated alarm circuit producing a continuous output signal Ua for monitoring fan speed. At proper operation in the nominal voltage range the alarm output is a „high“ level. When speed decreases below limit speed nG = 0rpm, e.g. by high friction torques, locked rotor condition, or low operating voltage, a „low“ level output will occur. When speed recovers, the alarm signal goes back to „high“, i.e. alarm is non-latched. Technical Data Designation Test condition Alarm output voltage Alarm signal level Ua Low n = nG Value Uba 30V DC n > nG „High“ n < nG „Low“ Isink = 2 mA Ua High n > nG Leakage current n > nG Symbol Uba = 30V UaL ≤ 0,4V DC UaH Uba Isink max. 15µA Max. sink current Isink 10 mA Alarm delay time t2 none Signal rise and tr, tf min. 0,5 V/µs fall time Ua (Stand. TTL) Alarm trip speed trÖLow-High-Flanke nG tfÖHigh-Low- < Alarm Diagram Speed 0rpm < < * < Alarm supply voltage Alarm signal ebm-papst St. Georgen GmbH & Co KG Page 2 / 2 < 3412N_37GV.DOC 06.03.2008