Siemens Synco RMZ792 - Changeover via Digital Input

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Building Technologies Basic documentation: Communication via the KNX bus CE1P3127en
HVAC Products Appendix 30.08.2007
9.2.1 Changeover via digital input
The changeover thermostat in the flow is wired to universal input "x"(configured as
a digital input) of the "H/C changeover" function block in controller 1 (RMU7x0B).
The heating/cooling changeover signal transmitted over the KNX bus affects all
controllers (in this case controllers 1 and 2) in the same heating/refrigeration
distribution zone, provided all controllers have the same heating/refrigeration zone
address.
1
M
T
1
T
KNX
1
S1 S1 S1
S2 S2
x
S2
S3
Q
Y
d
123
9
x
Kältebedarf
QYd
S4 S4 S4
S5
123
9
2
M
T
2
x
Q
23
9
2
S1 S1 S1
S2 S2
x
S2
S3
Q
Y
d
123
9
x
Kältebedarf
QY
d
S4 S4 S4
S5
123
9
x
Q
23
9
T
DI
H/C changeover
Refrig demand
Supervision
Controller
ControllerSupervision
Heat demand
H/C changeover
Refrig demand
Supervision
Controller
ControllerSupervision
Heat demand
Htg/ClgCoil 1
Htg/ClgCoil 2
3127S03en
Flow
Return
Heating/cooling changeover signal
Heat/refrig distribution zone 1
Changeover source
digital input DI
Changeover signal via
KNX