12/16
Siemens
RXB21.1, RXB22.1 Room controllers
CM2N3873en_06
Building Technologies
02 Apr 2010
Connection terminals
38
7
3A
0
9
17 18
EIB / KNX
1
2
4
3
QAX...
T
M
25 26 27 28
Q1
3
Q1
4
AC 230V
Q2
4
Q3
4
AC 230V 5(4)A
22 23 24
Q4
3
Q4
4
AC 230V 10A
19 19 21
N
L
N
21
L
M
D1
GN
D
D2
Y1
G
Y2
CP
–
CP
+
CE
–
CE
+
B1
1
2
3
4
5
6
7
8
9
13 14 15 16
10 11 12
N.
C
.
N.
C
.
N.
C
.
N.
C.
CE
–
CE
+
N.
C
.
Measured value input
B1
1
Measured value input for LG-Ni 1000 sensors
M
2
Measured value input ground
Signal inputs
D1 4 Signal
input
GND 5
Signal
ground
D2 6 Signal
input
Triac outputs
Y1
7
AC 24 V, 0.5 A switching output
G
8
AC 24 V actuator supply
Y2
9
AC 24 V, 0.5 A switching output
Room unit
CP– 13 PPS2
ground
CP+ 14 PPS2
data
CE+ 15
KNX / EIB data cable
CE– 16
KNX / EIB data cable
KNX / EIB bus (plug-in connection)
CE+ 17
KNX / EIB data cable
CE– 18
KNX / EIB data cable
Power supply
N 19 Neutral
conductor
R
21
Phase conductor AC 230 V +/- 10 %
Relay outputs
Q13 25
Common feed for Q14, Q24 and Q34
Q14 26
Normally-open contact, max. AC 250 V, 5 (4) A (Stage 1)
Q24 27
Normally-open contact, max. AC 250 V, 5 (4) A (Stage 2)
Q34 28
Normally-open contact, max. AC 250 V, 5 (4) A (Stage 3)
Q43 23
Lead wire for Q44
Q44 21
N/O contact AC max. 250 V, 10 A...(electric heating coil)
Observe the technical data for the relay outputs: Max. AC 250 V, 5 (4) A and 10
A, respectively
Local installation regulations must be observed.
Proprietary RJ45-type tool socket
1
32
06Z
01
2 3 4 5 6 7 8
1 KNX / EIB data cable (CE+)
2 KNX / EIB data cable (CE–)
3 Not
used
4 Not
used
5 +12VDC
6 RxD
7 PPS2 (CP+) / TxD
8 PPS2
(CP–)
RXB22.1
Caution
Tool socket