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Siemens
RXB39.1 – Room controller
CM2N3875en_04
Building Technologies
2013-06-16
Connection diagrams
G0
G
G0
G
N1 RXB39.1
B1, B2
LG-Ni 1000 temperature sensor
D1 … D4
Volt-free contacts (window contact, occupancy sensor, etc.)
Y1
0 … 10 V valve actuator heating
Y2
0 … 10 V valve actuator cooling (heating / cooling in case of changeover)
Q1 Controlled
fan
Q2
Power controller (PWM or modulating)
e.g. SEM61.4 + SEA45.1, data sheets N5102, N4937
Q3 Electric
heating
B3
QAX… room unit
Twisted pair
For Q2 (1.8 kW max. resistive load), use additional external fuses of max.
10 A to protect the PCB tracks.
For information on the compatibility of field devices with the RXB39.1 room
controller, refer to the RX hardware overview, CA2N3804.
Connection of
field devices, room
unit, KNX bus and
power supply
Note