Operating Instructions

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Siemens RXB application library (KNX) RXB – Fan coil applications from FC-10, FC-11, FC-12, FC-13 CM110672en_05
Building Technologies 4BFNC05 – Four-pipe fan coil with electric reheater 2013-06-07
2 1 4 3
QAX...
R1
10385A05_01
T
M D1 GND D2 Y1 G Y2 B1
19 21
25 26 27
RXB22.1
N
L
Q13 Q14
N
Q24 Q34
28
KNX
M
B
B1
T
D1
2)
D2
2)
YH
3)
4)
1 2 3
Q1
N
L
AC 230 V
N1
22 23
24
Q43 Q44
6)
F1
7)
YR
CP– CP+
CE– CE+
D3
2)
21
L
19
YC
3)
CE– CE+
2 3 4 5 6 7 8 9 13 14 15 16 17 181
N.C.
N.C.
M
YH.1
3)
M
YC.1
3)
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.
Q1
1-...3-speed fan.
YR
Electric reheater
6)
.
F1
External fuse, max. 10 A
7)
.
YH, YC
Heating/cooling valve actuator, thermal, 2-position (PDM) control
3)
.
YH.1, YC.1
Heating/cooling valve actuator, electromechanic, 2-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