Data Sheet for Product

10/16
Siemens RXB21.1, RXB22.1 Room controllers CM2N3873en_11
Building Technologies 2016-05-18
Ports/interfaces
Interface to room unit
Number of room units connectable
1
Interface type
for room unit
for ETS Professional / ACS
PPS2
KNX / EIB bus
PPS2 baud rate
4.8 kbit/s
Baud rate on KNX / EIB bus
9.6 kbit/s
KNX / EIB bus
Interface type
KNX / EIB (electrically isolated)
Transceiver
TP-UART
Bus current
5 mA
Baud rate
9.6 kbit/s
Bus topology: Refer to KNX / EIB manual
(Reference documentation, see below)
Cable connections
Connection terminals for signals and power supply
(plug-in screw terminals)
Solid or stranded
conductors
0.25 … 2.5 mm
2
or 2 x 1.5 mm
2
KNX / EIB bus connection terminals
(plug-in screw terminals)
Solid or stranded conductors 2 x max.1.0 mm
2
e.g. YCYM 2x2x0.8
Single cable lengths
For field devices, see also the RXB & RXL
installation guide, CM110381
Signal inputs D1, D2
Max. 100 m with diameters ≥ 0.6 mm
Measured value input B1
Max. 100 m
AC24 V triac outputs , Y1 … Y4
Max. 100m where A ≥ 1.5 mm
2
Relay outputs Q14, Q24, Q34, Q44
Depends on load and local regulations
Interface to room unit
Max. 115 m where A= 0.75 mm
2
(including connecting cable for tool)
Cable type
4-core, twisted pair, unscreened
KNX / EIB bus
Max. 500 m
Cable type: Refer to KNX / EIB manual
(see "Reference documentation" below)
Tool connecting cable
Max. 3 m
Housing
protection standard
Protection standard to EN 60529
IP30 with terminal cover fitted and
wall mounted without DIN rail
IP20 for all other mounting arrangements
Protection class
Suitable for use in systems with protection class I or II
Ambient conditions
Normal operation
Class 3K5 to IEC 60721-3-3
Temperature
0 ... 50 °C
Humidity
< 85 % rh
Transport
Class 2K3 to IEC 60721-3-2
Temperature
– 25 ... 65 °C
Humidity
< 95 % rh
Standards, directives and
approvals
Product standard EN 60730-1
Automatic electrical controls for household
and similar use
Product family standard
EN 50491-x
General requirements for Home and Building
Electronic Systems (HBES) and Building
Automation and Control Systems (BACS)
Electromagnetic compatibility (Applications)
For use in residential, commerce, light-
industrial and industrial environments
EU conformity (CE)
CM2T3873xx *)
RCM-conformity (EMC)
CA2T3834en_C1 *)
EAC conformity
Eurasia conformity
Konnex compliance
Certified
eu.bac
Meets the requirements for eu.bac certification
See product list at: http://www.eubaccert.org/ licences-by-criteria.asp
Type
License
Application
Control accuracy [K]
RXB21.1/FC-10
20856
Fancoil 2 pipes heating / coooling
0.2 / 0.1
Fancoil 4 pipes heating/ coooling
0.2 / 0.1
RXB22.1/FC-12
20853
Fancoil 2 pipes heating/ coooling
0.2 / 0.1
Fancoil 2 pipes / 2 wires
heating/ coooling
0.2 / 0.1
Product environmental declaration (contains data on
RoHS compliance, materials composi
tion, packaging,
environmental benefit, disposal)
CA2E3871 *)
Dimensions
See dimension diagrams
Weight
excluding packaging
0,640 kg
including packaging
0.670 kg
*) The documents can be downloaded from http://siemens.com/bt/download.