30368519EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Black: 230 VAC, 50-60 Hz
Blue: Neutral
Green/Yellow: Protective earth
Blue: GND - Control interface
Yellow: Control input 0-10V or PWM
Red: Voltage 10V (1.1 mA)
White: Tach output
EC fan motors with 0-10V speed regulation
High speed setting
The “High speed” setting provides the maxi-
mum fan speed according to datasheet. This is
achieved when a jumper connects the +10 V
output of the fan motor to the inlet signal (see
electrical scheme).
If continuous rpm modulation is needed, the
jumper should be removed and replaced by an
external signal (between 0 and 10 V max). The
jumper connection can be made in the connec-
tion box or inside each fan motor’s “black box”.
Low speed setting
The “Low speed” setting provides the reduced
fan speed according to datasheet. This is
achieved with a resistance kit reducing the steer-
ing signal from 10 V to 6.7 V. The fan will oper-
ate at a fixed rpm value.
If continuous rpm modulation is needed, the
resistance kit should be removed and replaced
by an external signal (between 0 and 6.7 V
max).
This resistance kit is located inside the connec-
tion box (if selected) or inside each fan motor’s
“black box”.
Jumper
Resistance kit
10V
Axial-lead resistor 0.25W
SN
0V
3.9 k
Ω
±5%
6.8 k
Ω
±5%
This procedure applies to both 1-phase and 3-phase fan motors.
