Page 2 / 15
Issue Date: 22.01.2020
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Deutschland · tel: 02778/6960-0 · fax: -400 ·
LCF02-Touch_3AO2DO_Datasheet_en.docx © 2020
»
REMARKS TO ROOM SENSORS
Location and Accuracy of Room Sensors
The room sensor should be mounted in a suitable location for measuring accurate room temperature. The accuracy of the temperature
measurement also depends directly on the temperature dynamics of the wall. It is important, that the back plate is completely flush to the wall so
that there is sufficient circulation of air through the vents in the cover, otherwise, deviations in temperature measurement will occur due to
uncontrolled air circulation. The temperature sensor should not be covered by furniture or other objects. Mounting next to doors (due to draught)
or windows (due to colder outside wall) should be avoided.
Surface and Flush Mounting
The measuring result is influenced by the thermal characteristics of the wall. A solid concrete wall responds to thermal fluctuations within a room
in a much slower than a light-weight structure wall. Room temperature sensors installed in flush-mounted boxes have a longer response time to
thermal variations. In extreme cases they detect the radiant heat of the wall even if the air temperature in the room is lower for example. The
quicker the dynamics of the wall (temperature acceptance of the wall) or the longer the selected inquiry interval of the temperature sensor is the
smaller the deviations limited in time are.
»
TECHNICAL DATA
Measuring values
temperature
Output voltage
terminal 2 | 3
(for heating and cooling)
2x 0..10 V
, min. load 10 kΩ
terminal 4
(for fan)
1x 0..10 V,
min. load 10 kΩ
Output switch contact
terminal 6 | 7
(electrical heater 3-stage)
2x normally open contact,
max. 250 V ~ / 3 A | max. 30 V = / 3 A
Network technology
RS485 Modbus, RTU, half-duplex, baud rate 4.800, 9.600, 19.200 or 38.400, parity: non (2 stopbits), even
or odd (1 stopbit)
Power supply
24 V = (±10%) | 24 V ~ (±20%) SELV
Power consumption
3 W (24 V =)
Measuring range temp.
+1..+50 °C
Accuracy temperature
±1 K (typ. at 21 °C)
Inputs
terminal 10
input for external sensor
NTC10K
terminal 11 – ESI | DP
input digital for floating contact,
window contact, dew point
sensor
terminal 12 - OCC
input digital for floating contact,
occupancy sensor, key card
switch
Control functions
set point adju1..+50 °C, (d16..+30 °C)
Display
LCD 64x41 mm, white or black background lighting
Enclosure
ABS, pure white or black
Protection
IP20 according to EN 60529
Cable entry
rear entry
Connection electrical
terminal block max. 1,5 mm²
Ambient condition
-10..+50 °C, max. 95% rH non-condensing
Mounting
flush mounted with standard EU box (Ø=60 mm)
Communication Modbus
Communication-section
1..247 Factory default: 1
Communication-Interface
RS485
Communication-Protocol
Modbus-RTU
Baud Rate
4800 bps / 9600 bps / 19200 bps / 38400 bps (optional) Factory default: 9600bps
Parity
no parity / odd parity / straight parity (optional) Factory default: no parity
Data:
8 bit
Stop
2 bit
