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Temperature Sensor
KNX T-UN
Technical Data
and Installation Notes
Elsner Elektronik GmbH Steuerungs- und Automatisierungstechnik
Herdweg 7 • D-75391 Gechingen • Germany
Phone: +49 (0) 70 56/93 97-0 • Fax: +49 (0) 70 56/93 97-20
[email protected] • www.elsner-elektronik.de
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The Temperature Sensor KNX T-UN consists of evaluation electronics and measuring
k
sensor. The sensor measures temperature in indoor and outdoor areas. The sensor can
receive an external measured value via the bus and process it with the own data to an
overall temperature (mixed value). The KNX T-UN provides four switching outputs with
adjustable threshold values as well as additional AND and OR logic gates. The sensor
has got a PI controller for heating and cooling.
Functions:
• Measurement of temperature
• Mixed value from own measured value and external value (proportions can be set in
percentage)
• PI controller for heating (one or two step) and cooling (one or two step)
• 4 switching outputs with adjustable threshold values (Threshold values can be set
by parameter or via communication objects)
• 4 AND and 4 OR logic gates with each 4 inputs. Every switching incident as well
as 8 logic inputs (in the form of communication objects) may be used as inputs for
the logic gates. The output of each gate may optionally be configured as 1 bit or 2 x 8
bits
Configuration is made using the KNX software ETS. The programme file (format VD2)
and the manual can be downloaded from the Elsner Elektronik homepage on
www.elsner-elektronik.de in the “Service” menu.
Technical specifications
Housing: Plastic material, sensor sleeve metal
Colour: Housing white, cable blac
Installation: Mounting
Protection category meas. sensor: IP 68
Dimensions evaluation electronics: approx. 38 x 47 x 24 (W x H x D, mm)
Dimensions measuring sensor: length sensor sleeve approx. 15 mm,
diameter approx. 6 mm, cable length approx. 300 cm
Ambient air humidity: Evaluation electronics: max. 95% R. H., avoid bedewing
Operating voltage: KNX bus voltage
Bus current: max. 8 mA
Data output: KNX +/- bus terminal plug
BCU type: Own micro controller
PEI type: 0
Group addresses: max. 184
Allocations: max. 184
Communication objects: 80
Measurement range: -30…+130°C
Accuracy at +25°C housing
temperature of evaluation
electronics:
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KNX T-UN Temperature Sensor • Date of issue: 31/08/2010 • Technical changes reserved. Errors reserved.
Sensor temperature Max. difference of measured value
±0°C ± 1.0°C
-30…+25°C ± 1.5°C
-30…+70°C ± 2.5°C
-30…+130°C ± 4.0°C
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The following standards have been considered for the evaluation of the product in terms
of electro magnetic compatibility:
Transient emissions:
• EN 60730-1:2000 Section EMV (23, 26, H23, H26) (threshold category: B)
• EN 50090-2-2:1996-11 + A1:2002-01 (threshold category: B)
• EN 61000-6-3:2001 (threshold category: B)
Interference resistance:
• EN 60730-1:2000 Section EMV (23, 26, H23, H26)
• EN 50090-2-2:1996-11 + A1:2002-01
• EN 61000-6-1:2004
The product has been tested for the above mentioned standards by an accredited EMV
laboratory.
Installation and Commissioning
Installation, inspection, commissioning and troubleshooting
of the sensor must only be carried out by a competent electrician.
Disconnect all lines to be assembled, and take safety precautions against accidental
switch-on.
The sensor is exclusively intended for appropriate use. With each inappropriate change
or non-observance of the instructions for use, any warranty or guarantee claim will be
void.
After unpacking the device, check immediately for any mechanical damages. In case of
transport damage, this must immediately notified to the supplier.
If damaged, the sensor must not be put into
operation.
If an operation without risk may supposedly not be guaranteed, the device must be put
out of operation and be secured against accidental operation.
The sensor must only be operated as stationary system, i.e. only in a fitted state and after
completion of all installation and start-up works, and only in the environment intended
for this purpose.
Elsner Elektronik does not assume any liability for changes in standards after publication
of this instruction manual.
Installation position
The evaluation electronics of KNX T-UN is installed in a socket. When choosing the
installation position avoid direct sun light as this could result in incorrect temperature
measurements.
For indoor installation the measuring sensor should not be mounted above a radiator for
the same reasons. Always ensure that direct draft from windows or doors does not
impair the measured values.
KNX T-UN Temperature Sensor • Date of issue: 31/08/2010 • Technical changes reserved. Errors reserved.
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Layout KNX T-UN
1 Slot for KNX terminal +/2 Programming LED
3 Programming button for teaching the instrument
4 Connection clamp for measuring sensor
5 Connection cable measuring sensor
6 Sensor tip (measuring sensor)
Connection of the temperature sensor
Connect the cable of the measuring sensor to the clamp (No. 4) of the evaluation
electronics (connection is reverse polarity protected). The cable connection may be
extended up to 20 m maximum. Connect the bus +/- to the KNX terminal (No. 1).
Notes on installation
Evaluation electronics must not be exposed to water. This could result in the electronic
being damaged. A relative air humidity of 95% must not be exceeded. Avoid bedewing.
Maintenance
The temperature sensor should regularly be checked for dirt and cleaned, if required.
Due to safety reasons, the sensor should always be disconnected
from the bus current when performing maintenance and cleaning
works (e.g. by deactivating/removing fuse).
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KNX T-UN Temperature Sensor • Date of issue: 31/08/2010 • Technical changes reserved. Errors reserved.
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