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Siemens
RXB application library (KNX)
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12 CM110672en_0
3
Building Technologies
FNC03 – Two-pipe fan coil with changeover and electric reheater
30.11.2007
2
1
4
3
QAX...
R1
10
385
A
0
2
T
17 18
M
D1
GN
D
D2
Y1
G
Y2
B1
19
21
25 26 27
RXB22.1
N
L
Q1
3
Q1
4
N
Q2
4
Q3
4
28
KNX
M
B
B1
T
D1
2)
D2
2)
YHC.1
3)
4)
1
2
3
Q1
N
L
AC 230 V
N1
D4
T
22 23 24
Q4
3
Q4
4
6)
F1
7)
YR
Y1
G
Y2
YHC.2
3)
M
CP–
CP+
CE–
CE+
D3
2)
21
L
19
CE–
CE+
2
3
4
5
6
7
8
9
13 14 15 16
1
N.
C.
N.
C
.
Ref.
Description
N1
Room controller.
R1
Room unit
B1
Return air temperature sensor, room temperature sensor.
D1
Window contact
2)
.
D2
Presence detector
2)
.
D3
Safety thermostat, electric heating coil.
D4
Changeover signal via KNX bus.
Q1
1- ... 3-speed fan.
YR
Electric reheater
6)
.
F1
External fuse, max. 10 A
7)
.
YHC.1
Heating/cooling valve actuator, thermal, 2-point (PDM) control
3)
.
YHC.2
Heating/cooling valve actuator, motorized, 3-position control
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).
6) The output of the electric heating coil at output Q44 must not exceed 1.8 kW.
7) External fuse, max. 10 A (protects pcb tracks).
A current list of compatible devices is available in the DESIGO RX hardware overview
(N3804).
Connection diagram
List of equipment
Note