User Manual

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Siemens Non-communicating room controllers CA2N3882en_01
Building Technologies RXA29.1 2012-08-28
Technical data
Power supply Operaing voltage AC 230 V ± 10 %
Rated voltage AC 230 V
Frequency 50/60 Hz
Power consumption with
output field devices connected Max. 12 VA
Internal fuse Thermal, non-resetting
Operating data Control algorithm PI
Inputs Signal inputs D1 … D3 (for volt-free contacts)
Quantity 3
Contact voltage DC 16 V
Contact current DC 8 mA
Contact transfer resistance Max. 100 
Contact insulation resistance Min. 50 k
Not suitable for pulse control
Measured value inputs B1 and B2
Type of signal is programmable (DIP switch) LG-Ni 1000 temperature sensor
or setpoint adjuster
Temperature sensor LG-Ni 1000
Measuring range 0 ... 50 °C
Sensor current 2.3 mA
Resolution 0.2 K
Measuring error at 25 °C sensor temp. (without
cable)
Max. 0.2 K
Setpoint adjuster BSG21.5
Reset range +/– 3K
Outputs AC24 V triac outputs , Y1 … Y4
Quantity 4
Output voltage (SELV, not earthed) AC 24 V ON/OFF, PWM or 3-position
(depending on application)
Output current Max. 0.5 A
Total nominal load
(at both outputs simultaneously)
Max. 9.5 VA
(e.g. 2 thermic valves, type STE72 per heating and
cooling sequence + 1 damper actuator 3.5 VA)
Interfaces Master/slave interface Proprietary
Max. number of slaves 3
Cable connections Connection terminals for signals and power
supply (screw terminals)
Stranded or solid conductors, 0.25 … 2.5 mm
2
or (solid conductors only) 2 x 1.5 mm
2
Single cable lengths Signal inputs D1…. D3 Max. 100 m with diameters  0.6 mm
Measured value inputs B1 and B2 Max. 100m where A  1.5 mm
2
AC24 V triac outputs , Y1 … Y4 Max. 100m where A  1.5 mm
2
Interface to slaves Max. 50 m where A = 0.75 mm
2
Cable type 2-core, twisted pair, unscreened
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 Operation Transport
Class 3K5 to IEC 60721-3-3 Class 2K3 to IEC 60721-3-2
Temperature 0 ... 50 °C – 25 ... 65 °C
Humidity < 85 % rh < 95 % rh
Standards and directives Product safety
Automatic electronic controls for
household and similar use EN 60730-1
Electromagnetic compatibility
Immunity (industrial & domestic) EN 60730-1
Emissions (domestic) EN 60730-1
compliance
Meets requirements of EMC Directive 2004/108/EC
Low Voltage Directive 2006/95/EC
C-Tick conformity (EMC)
AS/NZS 61000-6-3
Reduktion gefährlicher Substanzen 2002/95/EG
Dimensions See dimension diagrams
Weight Excluding packaging 0.59 kg