Flow sensor input
Contacts
Description
Marking
I1
(X22) Impulse signal
Cold water from riser (CW)
(Flow sensor)
⊥
Earthing on site for I1
―
+
Supply for I1
―
I2
(X21) Impulse signal
Heating return (primary)
(Flow sensor)
⊥
Earthing on site for I2
―
+
Supply for I2
―
External On/Off
Contacts
Description
Marking
(X6)
Room thermostat for
heating
(X7)
Safety temperature monitor
(STW)
RS485 interface
Note
It is possible to read current measured values, controller
- and output states with an external device (e.g. PC) and
to change the setting values.
Contacts
Description
Marking
(X13) Earthing on site
RS485 for Modbus/terminal
⊥
Earthing on site
RS485 for Modbus/terminal
B
B signal
RS485 for Modbus/terminal
A
A signal
RS485 for Modbus/terminal
9.3 Data output
Current measured values, controller status and output states can be
read and value settings changed in an external device, e.g. computer.
RS485 interface (4-pin terminal X14)
•
For terminal output or Modbus RTU communication.
Modbus RTU
•
For data output and possibility to change setting values.
•
For communication, a Modbus RTU master program (download,
for example "Modbus Poll") is required.
•
SETUP value "Address" must be set to "1 ... 253".
Transfer settings
Description
Value
Transmission rate
19200 bit/s
Data bits
8
Parity
No
Stop bits
1
Protocol
No protocol
Description
Value
Address
1 ... 253 (for Modbus)
9.4 Differential pressure regulator
DI0000026
A
C
B
0.333
0.278
0.222
0.167
0.111
0.056
0
7.6
17.1
4.3
1.9
0.5
11.9
l/s
l/h
ΔPv kPa
0
5
10
15
20
200
400
600
800
1000
1200
0
D
5 kP
a
10 kP
a
15 kP
a
20 kP
a
25 kP
a
30 kP
a
Item
Description
A
Volume flow
B
Δp across the valve kPa
C
Number of turns (default settings)
D
Outside volume range
9.5 Hydraulic balancing on the
manifold
m [kg/h]
0.25
0.5
1
2 3 4
Δp
[kPa]
0.1
0.2
0.3
0.5
1
2
3
5
10
20
30
50
100
3000
2000
1000
500
300
200
100
50
30
20
10
1
0.1
0.2 0.3 0.5
0.02
0.05
5
m [l/s]
10
2 3
5
DI0000047
Combi Port E D
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Installation and operation manual
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