Bus Communication - Honeywell SDC Service Manual

SDC / DHC
7.3.11
7.3.11.1
Function
NOTE
EN2H-0221GE51 R0812

Bus communication

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
10 SDC/DHC 43
20 SDC/DHC 43
30 SDC/DHC 43
40 SDC/DHC 43
50 SDC/DHC 43
There must always be a control device with the bus address 10 in
the bus system.
Hydraulic Components
Assignment
Central device 1 as "base unit"
Additional central device 2
Additional central device 3
Additional central device 4
Additional central device 5
223