User Manual / NDA 100/3 TH(S) RG L20 230AC(PoE) LAN
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1. Brief Description
The NDA 100/3-2 TH(S) series systems are electronic devices designed to monitor air temperature and
relative humidity. The measurements are made by a high-precision digital sensor, which can be internal
plug-in type (version THS) or external wired (version TH). Measured values are displayed on a large size LED
display, or can also be viewed remotely on a PC and logged in a database for later review. For this purpose
various communication interfaces are offered: USB, RS485, LAN or PoE LAN and DataLoggerTH software
application is available for download. In case of LAN interface, user can monitor the measured temperature
and humidity on the local Intranet as well, assuming his PC is located on the same LAN network.
Communication of display with external sensor or with external devices (e.g. PCs or PLCs) is performed via
MODBUS protocol. Displays equipped with USB or RS485 interface use MODBUS RTU protocol, whereas
displays with Ethernet LAN interface use MODBUS TCP/IP protocol. This protocol can be used to obtain
temperature and humidity data from display and to adjust display’s configuration settings using external
devices such as PCs, PLCs and various control units. Display can therefore be easily integrated into various
data acquisition systems or building management systems - BMS.
2. Models Available
There are eight different display and four sensor types available. Their selection depends on intended
application. Some applications require displaying temperature and humidity values without a need of
logging measured values. Other may require remote connection to a PC and data logging.
List of available display product types:
1. NDA 100/3-2
THS R
L20 230AC
USB
2. NDA 100/3-2
TH R
L20 230AC
USB
3. NDA 100/3-2
THS RG
L20 230AC
RS485
4. NDA 100/3-2
TH RG
L20 230AC
RS485
5. NDA 100/3-2
THS RG
L20 230AC
LAN
6. NDA 100/3-2
TH RG
L20 230AC
LAN
7. NDA 100/3-2
THS RG
L20
PoE LAN
8. NDA 100/3-2
TH RG
L20
PoE LAN
Meaning of the letter code:
NDA
Numerical Displays for Air quality.
100/3-2
Digit height 100 mm, 3 digits temp., 2 digits humidity.
THS
Display includes internal plug-in temp./humidity sensor.
TH
Display has connection for external sensor.
R
Red color LEDs.
RG
Multi color LEDs (red/green/yellow).
USB/RS485/LAN/PoE LAN
– Display interface used for data logging and setting display
parameters.
List of available temperature and humidity
sensor
product types:
1. THS Sensor 52 12DC RS485
2. THS Sensor 52 24DC RS485-GI
3. THS Sensor 40 12DC LAN
4. THS Sensor 40 PoE LAN
