11/16
Siemens
RXB21.1, RXB22.1 Room controllers
CM2N3873en_06
Building Technologies
02 Apr 2010
Connection terminals
CP –
CP +
CE
–
CE +
38
7
3A
08
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
B1
EIB / KNX
1
2
4
3
QAX...
T
M
25 26 27 28
Q1
3
Q1
4
AC 230V
Y3
G
Y4
M
Q24
Q34
AC 230V 5(4)A
19 19 21
N
L
N
21
L
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
Y3
10
AC 24 V, 0.5 A switching output
G
11
AC 24 V actuator supply
Y4
12
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)
Observe the technical data for the relay outputs: max. AC 250 V, 5 (4) A
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–)
RXB21.1
Caution
Tool socket