0-10V Circulation Pump Control - Riello TAU Unit 50 Installation And Maintenance Manual

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
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.
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
25
INSTALLATION
N
L - DHW (N.O.) / PB / PI
⏚
L - PC/PS/PI
N
⏚
PWM
0 - 10V
GND
PWM
0 - 10V
GND
PI
PC