User Manual

Heating, ventilation and air conditioning - room temperature control
Room temperature controllers with detached operation
RXB
236
Siemens Switzerland Ltd www.siemens.com/gamma 2020
Smart Infrastructure
7
Room controller for fan-coil applications with KNX communication
The RXB39.1 room controller is used for temperature control in individual rooms.
 For 2-pipe and 4-pipe fan coil systems with or without changeover
 PI control
 KNX bus communication
 Connection to Desigo building automation and control system via PX KNX
 DC 0...10 V control of valve and actuators, fan (ECM), and electric heater
 2 Potential-free relay contacts to release fan and electric heating
 Commissioning with ETS Professional, "Handy Tool" QAX34.3 or Synco ACS
 Operating voltage AC 230 V
 Plug-in screw terminals
Data sheet
N3875
Operating voltage
AC 230 V
Frequency
50/60 Hz
Power consumption
12 VA
Control algorithm
PI
Communication
Bus: KNX
Room unit: PPS2
Service plug
ETS Professional, ACS, HandyTool
Analog inputs, number
2
Analog outputs, number
3
Analog output, signal
DC 0...10 V
Digital inputs, number
4
Relay outputs, number
1
Electric reheater relay
1
Relay output, switching voltage
AC 250 V
Relay output, switching current
5 (4) A
Mounting
On DIN rail
Mounting location
Ceiling voids with cover
Fan coil
Panel
Degree of protection
IP20
Dimensions (W x H x D)
152 x 120 x 62 mm
RXB39.1/FC-13
Stock no.
Product no.
S55373-C121
RXB39.1/FC-13