Catalog

Room automation
Desigo RX
Communicating controllers - RXC (LonWorks)
4-74
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www.siemens.com/buildingtechnologies-productcatalog
Siemens Switzerland Ltd
Building Technologies Division
4
Product Title Triac outputs‚ number Relay outputs‚
number
Electric reheater relay Stock No. Product No.
Room controller for
fan coils with 1-speed
fan or chilled ceil-
ing/radiator with
basic application
OOO20
2 1 0 S55373-C111 RXC20.5/00020
Room controller for
fan coils with 3-speed
fan and/or outside air
damper with basic
application OOO21
4 3 0 S55373-C112 RXC21.5/00021
Room controller for
fan coils with 3-speed
fan and electric
reheater with basic
application OOO22
2 4 1 S55373-C113 RXC22.5/00022
Range overview RXC20/21/22..
Data sheet N3834
Operating voltage AC 230 V
Frequency 50/60 Hz
Power consumption 12 VA
Control algorithm PI
Digital inputs‚ number 2
Triac outputs ON/OFF
Triac output‚ switching voltage AC 24 V
Triac output‚ switching current 0.5 A
Relay output‚ switching voltage AC 250 V
Relay output‚ switching current 5 (4) A
Communication Bus: LonWorks
Room unit: PPS2
Service plug RXT10..‚ RXT20.1
Mounting location Ceiling voids with cover
Fan coil
Panel
Mounting On DIN rail
With screws
Dimensions (W x H x D) 113 x 167 x 62 mm
The application determines the usable actuator (2-position/3-position) with the triac output
Room controller with LonWorks communication
The RXC20..‚ RXC21.. and RXC22.. controllers are used for temperature control in individual rooms.
- For 2- or 4-pipe fan coil systems with or without changeover
- For chilled ceilings and radiators
- Control of thermic valve actuators AC 24 V‚ PDM‚ valve and damper actuators AC 24 V (3-position) or
electric air heater units
- Volt-free relay contacts for fan speed control
- Connection to Desigo building automation and control system
- LonMark-compatible bus communication
- Plug-in screw terminal
Application description: CA110300
RXC20/21/22..