Data Sheet for Product

Commissioning
If several devices are operated by the same room controller, an address must be set for
each one (see "Engineering notes"). Only one device will operate with the factory-set
default.
Note In the standard application with only one room operator unit, the defaults are ID = 1
and MST = 0 (sensor active). The room operator units are therefore factory-set to these
defaults.
Depending on the location of the sensors, the measured value may need to be adjusted
with the SCOPE or HSC tool (see "Engineering notes").
Technical data
Power supply (from HRC3..) Working voltage DC 9..15 V
Current 20 mA
Bus interface Bus voltage SELV DC 12 V
Type RS485
Transmission speed 4800 baud
Temperature signal input Voltage DC 0…12 V
10…40 °C
Current 1 mA
Measuring element NTC 10kOhm
Setpoint correction Correction range ± 2 or ± 4 K
Resolution 0.5 K or 1 K
Parameters Parameters set with internal software and
stored in EEPROM
Environmental conditions Operating temperature: -5...+ 50 °C
Transport temperature: -25..+ 65 °C
Humidity <95 % non-condensing
Air pressure during operation: Min. 700hPa (3000m above sea level)
Air pressure during transportation: Min. 700hPa (10, 000m above sea level)
Standards
Product safety Automatic electrical controls for household
and similar use
EN 60 730-1 and EN 60 730-2-11
Electromagnetic
compatibility
Emitted interference in accordance with
Interference immunity in accordance with
EN 61000-6-3
EN 61000-6-2
Housing protection Protection standard
Protection class
IP 20 to EN 60529
III to IEC1140
conformity Meets the requirements of
EMC Directive 89/336/EEC
Low Voltage Directive 73/23/EEC
UL/CUL approval UL/CUL 916
Dimensions Suitable for flush mounting in rectangular
flush-mounting box or cavity-wall box
4 modules
Color Operator panel label Pantone black 7U2Y
Dimensions See also dimension diagrams 103mm x 51mm x 25mm
Weight Excluding packaging
With packaging
0.050 kg
0.068 kg
6/8
Siemens HTC3.1/A, HTC3.1S/A – Room operator units CM2N6319en
Building Technologies 31.07.2008