Siemens Desigo RXC20.1 - Connection Diagrams and Notes; Field Device Connection Diagram; Connection Notes

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Siemens RXC20, RXC21, RXC22 – Room controllers CA2N3834en_09
Building Technologies 2013-06-16
Connection diagrams
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
G
CP–
CP+
CLA
CLB
B1
CLA
CLB
Y3
G
Y4
19
19
21
N
L
N
25
26
27
28
Q13
Q14
Q24
Q34
2
3
1
N
L
N
L
AC 230 V
1
N
L
Q1
Q1.1
B2
PPS2
Y3
Y4
Y1
Y2
D1
D2
T
B1
GL
Y3.1
M
GL
Y1.1
M
Y1.2
Y2.2
N1
3834A05
Q43
Q44
23
22
24
L
N
Q2
Y3.2
Y4.2
21
L
LonWorks® Bus
LonWorks® Bus
N1 RXC20, RXC21, RXC22
B1 Temperature sensor LG-Ni 1000
D1, D2 Volt-free contacts (window contact, occupancy sensor, etc.)
Y1...Y4 AC 24 V thermic valve actuators
Y1.1 AC 24 V, 3-position valve or damper actuator
Y1.2, Y2.2, AC 24 V contactors for electric heating coil
Y3.1 AC 24 V, 3-position valve or damper actuator
Y3.2, Y4.2 AC 24 V contactors for electric heating coil
B2 QAX… room unit
Q1 3-speed fan
Q1.1 1-speed fan
Q2 Electric heating coil
Twisted pair
 Parallel operation of fans at relay outputs Q14 … Q34 is not permitted. For
parallel operation use cut-off relays or slave room controllers.
 At Q2 (1.8 kW max. ohmic load), use additional external fuses of max. 10 A to
protect the conductor tracks.
For information on the compatibility of the various field devices with the RXC20, RXC21
and RXC22 room controller, refer to the various application descriptions.
See Applications library, document V1: CA2A3810, V2: CA110300).
Connection of
field devices, room unit,
L
ONWORKS® bus and
power supply
STOP
Note!
Note