User Manual

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Siemens RXT20.1 – Service terminal CA2N3851en_03
Building Technologies 2015-12-23
Power supply
Oper
ating voltage range
DC 12...15 V (SELV)
DC 12…15 V class 2 (US)
The service terminal receives its supply from the connected controller via the PPS2 interface
Power consumption (controller)
Max. 0.10 VA
Function data
Display
Type
LCD
Functions displayed
–
Controller and room unit status
–
Wink function
– Additional information of the room unit
Function keys
–
Function key 1: Error message display
–
Function key 2: Remote operation of service
pin and display of additional information of
the room unit
Interfaces
Interface between controller and service terminal
PPS2 (point-to-point interface, Version 2)
Baud rate
4.8 kBit/s
Cable connections
Cable for connection to controller or room unit
Built-in
Cable length
Approx. 15 cm
Protection data
Housing protection standard
IP 30 to EN 60529
Protection class
III to EN 60730-1
Environmental conditions
Operation
IEC 721
Climatic conditions
Class 3K5
Temperature
0 ... 50 °C
Humidity
< 85 %rh
Mechanical conditions
Class 3M1
Transport
IEC 721
Climatic conditions
Class 2K3
Temperature
– 25 ... 70 °C
Humidity
< 95 %rh
Mechanical conditions
Class 2M2
Standards, directives and
approvals
Product standard EN 60730-1
Automatic electrical controls for household
and similar use
Electromagnetic compatibility (Applications)
For use in residential, commerce, light-
industrial and industrial environments
EU conformity (CE)
CA2T1741xx *)
UL certification (US)
UL916, http://ul.com/database
RCM-conformity (EMC)
A5W00005055 *)
EAC conformity
Eurasia conformity
2011/65/EU
2002/95/EC
Dimensions
see “Dimensions”
Colour
Housing cover
NCS 0502-Y14R
Operator controls
RAL 7035
Weight
Excluding packaging
0.13 kg
*) The documents can be downloaded from http://siemens.com/bt/download.
3851A01
PPS2
Tool
A
R1
7 8 1 2
4 3 2 1
C–
C+ CP– CP+
Bus
PPS2
7
8
1
2
RJ45
B
ca. 15 cm
Bus
R1 RXT20.1 service terminal
A Connection to Desigo RXB /
RXC controller or QAX…
room unit
B Bus connection:
RXC for RXT10
commissioning and
service tool
RXB for KNX / EIB bus
Technical data
Internal diagram