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5.7.3 The SCB-01 expansion PCB
The SCB-01 has the following features:
Two potential free contacts for status notifications
0–10 V output connection for a PWM system pump
Expansion PCBs are automatically recognised by the control unit of the
boiler. If expansion PCBs are removed, the boiler will show an error code.
To resolve this error, an auto-detect must be carried out after removal.
Connecting status notifications
The two potential-free contacts, Status, can be configured as required.
Depending on the setting, a particular status can be transmitted by the
boiler.
Connect a relais as follows:
Nc Normally closed contact. Contact will open when status occurs.
CMain contact.
No Normally opened contact. Contact will close when status occurs.
Select the desired status notification (setting) using parameter EP018 and
EP019.
Connecting 0–10 V output
The 0-10 contact can be used to connect a PWM system pump. The
speed of the pump is modulated based on the signal received from the
boiler. Depending on the make and type of pump, the pump can be
controlled by a 0–10 V or a PWM signal.
Connect the system pump controller to connector 0-10.
Select the type of signal that will be sent from the boiler using the
parameter EP029.
Select the type of signal that controls the pump using the parameter
EP028.
Fig.59 SCB-01 PCB
AD-3001514-01
NoCNc
Status
NoCNc
Status
+0
0-10
Fig.60 Status notifications
AD-3001312-01
C No
Nc
Status A
C No
Nc
Status B
Fig.61 0–10 V output connector
AD-3001305-01
+
-
0-10
5 Installation
38 7734324 - v.06 - 01102021
38


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