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Siemens
RXB39.1 – Room controller
CM2N3875en_04
Building Technologies
2013-06-16
Technical data
Power supply
Operating voltage
AC 230 V +/-10 %
Rated voltage
AC 230 V
Frequency 50/60
Hz
Power consumption with connected field devices
Max. 12 VA
Internal fuse
Thermal, non-resetting
Operating data
Control algorithm
PI
Inputs (SELV)
Signal inputs D1 … D4
Quantity
4
(for volt-free contacts)
Contact voltage
DC 16 V
Contact current
DC 5 mA
Contact transfer resistance
Max. 100
Contact insulation resistance
Min. 50 k
Switch time:
min. 20ms “ON”, min. 20ms “OFF”
Measured value input B1
Compatible temperature sensors
LG-Ni 1000
Quantity 2
Measuring range
0 … 50 °C
Sensor current
0.5 mA
Resolution 0.1
K
Measuring error at 25 °C sensor temp. (without cable) max. 0.5 K
Outputs (SELV)
DC 0 … 10 V YC1, YC2, YC3
Quantity
3
Resolution
3 mV
Accuracy
100 mV
Output current
Max. 1.5 mA
Supply output G (SELV)
Voltage / Max. load
AC 24 V / Max. 6 VA
Relay outputs
Q34 (fan release)
Quantity
1 (N/O contact)
Relay type
Monostable
Contact rating with AC voltage
Switching voltage
Max. AC 250 V, min. AC 19 V
Nominal current, resistive/inductive
Max. AC 5(4) A (cos
= 0.6)
Making current 200 ms half-time
Max. 20 A
Switching current at AC 19 V
Min. AC 10 mA
Contact rating with DC voltage
Switching voltage
Max. DC 250 V, min. DC 5 V
Switching current at DC 5 V
Min. DC 100 mA
Switching capacity
Max. 20 W
Inductive load L/R
Max. 7 ms
External fuse (essential!)
Max. 10 A
Q14 (heater release)
Quantity
1 (N/O contact)
Relay
type
Monostable
Contact rating with AC voltage
Max. admissible load (resistive only)
Max. 1.8 kW
External fuse (essential)
Max. 10 A
Ports/interfaces
Interface to room unit
Number of room units connectable
1
Interface type
for room unit
for ETS / ACS
PPS2
KNX bus
PPS2 baud rate
4.8 kbit/s
Baud rate on the KNX bus
9.6 kbit/s
KNX bus
Interface type
Electrically isolated
Bus current
5 mA
Baud rate bus
9.6 kbit/s
Bus topology
Refer to Engineering, page 6
