Riello Dialog Plus 300, Instruction Manual

Page: 15 / 58

15
ENGLISH
pWm input signal
The pump will not start with a low input signal value (<5
% PWM). The pump stops if the PWM input signal falls to
5-8%. The pump stops for safety reasons in the absence
of a PWM signal. If the pump receives no input, for exam-
ple because of a broken cable, it stops to prevent the
solar circuit overheating.
0 5 10 20 30 40 50 60 70 80 90 100
Spee
d
PWM input signal (%)
Max.
electronic control circuit
PWM output
PWM input
Reference signal
Opto-isolator
Pump electronics
technical specifications
maximum power symbol Value
PWM input frequency f 100-4000
Hz
Consumption in standby < 1 W
Input signal high voltage
level UiH 4-24 V
Input signal low voltage
level UiL < 1 V
Input signal current inten-
sity IiH < 10 mA
Input duty cycle PWM 0-100%