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INSTALLATION
Speed (%)
100
0 5 10
20
30
40
Set parameter 135 = 1
PWM signal (%)
≤ 10
> 10 / ≤ 84
> 84 / ≤ 91
> 91/95
> 95 / ≤ 100
9
Verify that the control logic of your pump is directly propor-
tional (as indicated in the chart) and not inversely propor-
tional.
Electronic circuit
Opto-isolator
PWM output
Reference
signal
PWM input
Technical specifications
Maximum power
PWM input frequency
Consumption in stand-by
High voltage level of the
input signal
Low voltage level of the
input signal
Input signal current
Input Duty cycle
50
60
70
80
90 100
PWM input signal (%)
Circulation pump status
Maximum speed
Variable speed (from min to
max)
Minimum speed
Hysteresis range: on/off
Standby: off
Symbol
Value
f
100-4000 Hz
< 1 W
UiH
4-24 V
UiL
< 1 V
IiH
< 10 mA
PWM
0-100%
2.14 0-10V circulation pump control
The regulator allows the control in modulating mode (0-10V) of
one circulation pump (as an alternative to standard 230Vac cir-
culation pumps).
To enable pump control set parameter 135 = 1 and parameter 136
= Modulating.
MO2
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
M02
High-voltage terminal board
PI
Central heating system pump
PC
Thermal unit circulation pump
26
N
L - DHW (N.O.) / PB / PI
⏚
L - PC/PS/PI
N
⏚
PWM
0 - 10V
GND
PWM
0 - 10V
GND
PI
PC
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