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Siemens
RXB application library (KNX)
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12 CM110672en_0
3
Building Technologies
FNC18 – Two-pipe fan coil (changeover) and radiator
30.11.2007
KNX
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
GN
D
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)
2
1
3
4
QAX...
R1
10385A09
YH.1
3)
Y1
G
Y2
YH.2
3)
M
T
D3
CE–
CE
+
CE–
CE
+
N.
C
.
YHC.1
3)
Y1
G
Y2
YHC.2
3)
M
19
21
N
L
N
21
L
19
M
M
YH.3
YHC.3
T
B2
Heating surface (YH) / fan coil changeover (YHC)
Y1
Y2
Y3
Y4
Thermal / thermal
YH
YHC
X
--
Motorized / motorized
YH
YH
YHC
YHC
Thermal / motorized
YH
X
YHC
YHC
Motorized / thermal
YH
YH
YHC
--
Motorized/bus YH
YH
--
--
Bus/motorized X
X
YHC
YHC
Thermal/bus YH
X
--
--
Bus/thermal X
YHC
X
--
Bus/bus X
X
--
--
X = Not freely available
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).
Connection diagrams
Connection variants for
valve actuators