Connection diagrams
Connection of
field devices, room
unit, KNX / EIB bus
and power supply
Note
12 / 16
Siemens
Building Technologies
N1
B1
1
M
2
D1
4
GND
5
D2
6
Y1
7
G
8
Y2
9
Y3
10
G
11
12
Y4
13
CP –
14
CP +
CE +
15
CE –
16
CE +
17
CE –
18
19
N
N
19
L
21
L
21
N1
RXB24.1
B1
LG-Ni 1000 temperature sensor
D1, D2
Volt-free contacts (window contact, occupancy sensor, etc.)
Y1...Y4
AC 24 V thermic valve actuators
Y1.1
Motorized AC 24 V, 3-position valve actuator
Y2.1
Motorized AC 24 V, 3-position valve actuator
B2
QAX... room unit
Twisted pair
For information on the compatibility of field devices with the RXB24.1 room
controller, refer to the various application descriptions
(see the CLC and RAD description of functions, document CA110384)
RXB24.1 – Room controller
T
B1
D1
D2
Y1
Y2
Y3
Y4
2
PPS2
1
B2
4
KNX / EIB
3
KNX / EIB
N
AC 230 V
L
GL
M
Y1.1
Y2.1
M
GL
CM2N3874en_04
02 Apr 2010