Siemens Desigo RXB Technical Manual page 79

Electrical connections
Terminal layout
Wiring diagram
Siemens
Building Technologies
The example below shows the room unit connected to a DESIGO RXB room controller.
1 2
R1
PPS2
R1 QAX34.3 room unit
N1 RXB... room controller
QAX34.3 – Room unit with PPS2 interface
PPS2 interface, power supply
CP+ 1 Device power supply, PPS2 data (positive)
CP– 2 Device power supply, PPS2 data (negative)
N1
= Twisted pair
7/8
CM2N1640en_04
30 Jun 2009