Changeover Via Digital Input - Siemens RXB Series Basic Documentation

Changeover source
digital input DI
Changeover signal via
KNX
T
Flow
Return
DI
T
66 / 88
Siemens
Building Technologies
9.2.1

Changeover via digital input

The changeover thermostat in the flow is wired to universal input "x" (configured as
digital input) of the "H/C changeover" function block in controller 1 (RMU7x0B).
The heating/cooling changeover signal transmitted over the KNX bus acts on all
controllers (here, controllers 1 and 2) in the same heating/cooling distribution zone,
provided all controllers have the same heating/cooling zone address.
Htg/ClgCoil 1
T
1
M
1
Heating/cooling changeover signal
Heat/refrig distribution zone 1
x
x
Supervision
1
H/C changeover
Heat demand
23
Q
Q
x
x
Supervision
2
H/C changeover
Heat demand
23
Q
Q
KNX bus communications
Appendix
KNX
x
Controller
Supervision
1 2 3
S1 S1 S1
Refrig demand
Kältebedarf
S2
S2 S2
S3
d Y Q d Y
x
Controller Supervision
1 2 3
S1 S1 S1
Refrig demand
Kältebedarf
S2
S2 S2
S3
d
d Y Q Y
Htg/ClgCoil 2
T
2
M
2
Controller
1 2 3
S4 S4 S4
S5
Controller
1 2 3
S4 S4 S4
S5
For internal use only
CE1P3127en
2013-04-08