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SDC / DHC Hydraulic Components
EN2H-0221GE51 R0808 221
7.3.11 Bus communication
7.3.11.1 Bus address of central device
Control devices SDC and DHC 43 can be connected via a data
bus. This makes it possible
• to control additional heating circuits by adding up to four
additional central devices.
• to connect wall devices to the central devices and assign
heating circuits.
• to cascade multiple heat generators with one built-in central
device each.
The following figure shows the maximum possible expansion
stage of the bus system.
The individual devices in the SDC/DHC 43 bus system contain a
unique address. It is set in the corresponding parameter in the
"Data Bus" menu. Assignment is carried out using the table
below.
Address Device type Assignment
10 SDC/DHC 43 Central device 1 as "base unit"
20 SDC/DHC 43 Additional central device 2
30 SDC/DHC 43 Additional central device 3
40 SDC/DHC 43 Additional central device 4
50 SDC/DHC 43 Additional central device 5
There must always be a control device with the bus address 10 in
the bus system.
Function
NOTE