Product Data Sheet RER190-39/14/2TDMO

06/16/2015

page 5 of 13

Schematics

Input voltage divider:

R1 = 47 kOhm

R2 = 36 kOhm

For protection: There is parallel to R2 a 5,1 V Z-Diode

Speed control:

By pulse-width modulation (PWM) 0 ... 100%

with switching transistor in emitter circuit and collector resistance to 12 V

Frequency = 2 kHz (1 - 10 kHz)

Information to the curve PWM:

0% - <10% PWM:

0 1/min

10% PWM:

800 1/min (Fan on, comming from 0% PWM)

10% - 13% PWM:

800 1/min (corresponding to min. speed)

13% - 78% PWM:

linear increasing curve

78% - 100% PWM:

3.900 1/min (corresponding to max. speed)

10% - >8% PWM:

linear decreasing curve (comming from 100% PWM)

8% PWM:

600 1/min or 0 1/min (Fan off, comming from 100% PWM)

or: