User Manual

7/14
Siemens Non-communicating room controllers CA2N3881en_02
Building Technologies RXA20.1, RXA21.1, RXA22.1 2012-08-28
Relay outputs Q14, Q24, Q34
External fuse Max. 10 A
Quantity 1 (RXA20.1)
3 (RXA21.1, RXA22.1)
Relay type Monostable
Contact rating with AC voltage
Switching voltage Max. AC 250 V, min. AC 19 V
Nominal current, resistive/inductive Max. AC 5 A/4 A (cos  = 0.6)
Making current 200 ms half-time Max. 20 A
Switching current at AC 19 V Min. AC 10 mA
Contact rating with DC voltage
Switching voltage Max. DC 250 V, min. DC 5 V
Switching current at DC 5 V Min. DC 100 mA
Switching capacity Max. 20 W
Inductive load L/R Max. 7 ms
Q44
External fuse (essential) Max. 10 A
Relay type Monostable
Max. admissible load (resistive only) Max. 1.8 kW
Interfaces Interface to room units Interface type PPS2
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 X2 Max. 100m where A  1.5 mm
2
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 units (PPS2) Max. 115 m where A = 0.75 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