121121
Speed setting
with control voltage or PWM
– The control variable is a PWM signal or analogue control voltage.
– Standard PWM signal in 2 versions
a) PWM frequency 2kHz (0-100%), Open collector input
b) 4-Wire interface to Intel specification for 12 VDC fan,
PWM frequency 20 kHz, incl. speed signal /2
Customer
Fan
(+) Power
(-) 0V Ground
Input
Customer
Fan
(+) Power
(-)0VGround
Input
(+) Power
Customer
Fan
(+)InternalRef.
(-)0VGround
Input
Speed setting via PWM Type P
Speed setting via control voltage Type A
– Standard control range 0 ... 5 V.
– Optional control range 0 ... 10 V.
Standard curve P / A Optional – selectable curve P / A
A
5 V
(Optional)
10 V
0 5 10
0
0
0
PW M100%90
n
max
n
min
A
5 V
(Optional)
10 V
0
0
0
100 % P WM
n
max
n
min
AA
PWMPWM
InformationDC axial fansDC fans - specialsACmaxx / i-maxxAC axial fansAccessoriesRepresentatives DC centrifugal fansAC centrifugal fans
