Brochure

Heating, ventilation and air conditioning - room temperature control
Room temperature controllers with detached operation
RXB
245
Siemens Switzerland Ltd www.siemens.com/gamma 2021
Smart Infrastructure
7
Room controller with KNX communication
The controllers are used for temperature control in individual rooms.
 For 2-pipe with changeover or 4-pipe fan coil systems
 For radiator and chilled ceiling (RXB24.1 only)
 Control of thermal valve actuators AC 24 V, PWM, valve actuators AC 24 V (3-position) as well as KNX
bus actuators
 Potential-free relay contacts for fan speed control
 Connecting relay for electric heating (RXB22.1 und RXB39.1)
 KNX bus communication
 Connection to Desigo building automation and control system via PX KNX
 Commissioning with "Handy Tool" QAX34.3 or Synco ACS
Application description fan coil: CM110672
Application description RAD/CLC: CM110671
Operating voltage
AC 230 V
Frequency
50/60 Hz
Power consumption
Max. 12 VA
Control algorithm
PI
Communication
Bus: KNX (S-mode and LTE mode)
Room unit: PPS2
Service plug
RXT20.1
Digital inputs, number
2
Relay output, switching voltage
AC 250 V
Relay output, switching current
5 (4) A
Triac outputs
PWM
3-position
Triac output, switching voltage
AC 24 V
Triac output, switching current
0.5 A
Interface type
KNX-bus
Mounting
DIN rail
Mounting location
Ceiling voids with cover
Fan coil
Panel
Degree of protection
IP30
Dimensions (W x H x D)
113 x 167 x 62 mm
RXB2..
Range overview RXB2..
Product Title
Triac outputs,
number
Relay outputs,
number
Data sheet
Stock no.
Product no.
Room controller for 3-speed fan
4
3
N3873
BPZ:RXB21.1/FC-10
RXB21.1/FC-10
Room controller for 3-speed fan
4
3
N3873
BPZ:RXB21.1/FC-11
RXB21.1/FC-11
Room controller with 3-speed fan
and electric heating coil
2
4
N3873
BPZ:RXB22.1/FC-12
RXB22.1/FC-12
Room controller for chilled ceilings
and radiators
4
0
N3874
BPZ:RXB24.1/CC-02
RXB24.1/CC-02
The application determines the usable actuator (PWM /3-position) with the triac output