33/52
Siemens
RXB application library (KNX)
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12 CM110672en_0
3
Building Technologies
– Two-pipe fan coil with changeover and outside air damper
30.11.2007
Y1
G
Y2
YHC.2
3)
M
YHC.1
3)
KNX
D3
T
4)
1
2
3
Q1
N
L
AC 230 V
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
17 18
M
D1
GND
D2
Y1
G
Y2
CP
–
CP
+
B1
25 26 27
RXB21.1
Q1
3
Q1
4
Y3
G
Y4
Q2
4
Q3
4
28
N1
M
B
B1
T
D1
2)
D2
2)
Q2
3
Q2
4
2
1
3
4
QAX...
R1
10
385
A
0
7
Y1
G
Y2
YM
3)
M
B2
T
D4
2)
T
CE–
CE
+
CE–
CE
+
N.
C.
19
21
N
L
N
21
L
19
Ref.
Description
N1
Room controller.
R1
Room unit
B1
Return air temperature sensor,
room temperature sensor.
B2
Outside air temperature sensor via KNX bus.
D1
Window contact
2)
.
D2
Presence detector
2)
.
D3
Changeover signal via KNX bus.
D4
Safety thermostat, outside air.
Q1
1- ... 3-speed fan
4)
.
YHC.1
Heating/cooling valve actuator, thermal, 2-point (PDM) control
3)
.
YHC.2
Heating/cooling valve actuator, motorized, 3-position control
3)
.
YM
Damper actuator for outside air AC 24 V, 3-position
3)
.
2) Type of operation and allocation to inputs D1 and D2 can be selected. Identical devices must not be
connected to both inputs.
3) Do not exceed the max. simultaneous load on outputs Y1 ... Y4: 9.5 VA (see data sheet 3873).
4) Do not connect the fans in parallel (or use cut-off relays).
A current list of compatible devices is available in the DESIGO RX hardware overview
(N3804).
Connection diagram
List of equipment
Note