MDT SCN-DTSEN1.01 User manual

MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [email protected] • www.mdt.de
State 12/2022 Version V1.0
Technical Manual
MDT
Twilight-/Temperature Sensor KNX
SCN-DTSEN1.01
Further Documents:
Datasheet:
https://www.mdt.de/EN_Downloads_Datasheets.html
Assembly and Operation Instructions:
https://www.mdt.de/EN_Downloads_Instructions.html
Solution Proposals for MDT products:
https://www.mdt.de/EN_Downloads_Solutions.html

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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1 Content
1Content............................................................................................................................2
2Overview .........................................................................................................................3
2.1 Overview devices.................................................................................................................. 3
2.2 Functions .............................................................................................................................. 4
2.3 Exemplary Circuit Diagram ................................................................................................... 4
2.4 Structure & Handling ............................................................................................................ 5
2.5 Commissioning ..................................................................................................................... 5
3Communication objects ....................................................................................................6
3.1 Standard settings of the communication objects................................................................. 6
4Reference ETS-Parameter ................................................................................................7
4.1 General Settings ................................................................................................................... 7
4.2 Light sensor........................................................................................................................... 8
4.3 Twilight sensor....................................................................................................................11
4.4 Temperature sensor ........................................................................................................... 13
5Index............................................................................................................................. 16
5.1 Register of illustrations.......................................................................................................16
5.2 List of tables........................................................................................................................ 16
6Appendix ....................................................................................................................... 17
6.1 Statutory requirements ...................................................................................................... 17
6.2 Disposal .............................................................................................................................. 17
6.3 Assembly ............................................................................................................................ 17
6.4 History................................................................................................................................. 17

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
3
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2 Overview
2.1 Overview devices
The description refers to the following devices (order number in bold):
•SCN- DTSEN1.01 Twilight sensor/Temperature sensor KNX
oLight sensor for detection of twilight and brightness
oTemperature sensor to measure the outside temperature

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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2.2 Functions
Light sensor
In addition to the current value in lux, the light sensor provides two separately adjustable threshold
values (1-bit switch or 1-byte scene). The threshold values can be locked by object. Due to the wide
measuring range of up to 100000 lux, the sensor, in combination with an MDT Shutter Actuator, is
also suitable for targeted shading of individual windows or facades.
Twilight sensor
The twilight sensor makes the "Day/Night" object available to the KNX bus via adjustable lux values,
the polarity ("1/0" or "0/1") is adjustable. This means, for example, that the MDT Glass Push Button
II Smart automatically switches to Night mode when it gets dark. Blinds or shutters can be raised or
lowered via the 1-bit switch object with an adjustable delay in the morning and/or evening with the
twilight.
Temperature sensor
The measured outdoor temperature can, as a 2-byte value or via one of the two adjustable
threshold values, for example, block or release the shading of the MDT Shutter Actuators. The
temperature can be displayed in a visualisation or e.g. on the Glass Push Button II Smart.
2.3 Exemplary Circuit Diagram
Figure 1: Exemplary circuit diagram

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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2.4 Structure & Handling
The following picture shows the structure of the device (circuit board visible after opening the
cover):
Figure 2: Structure & Handling
1 = Programming button 2 = Programming LED
3 = Bus connection terminal 4 = Brightness sensors
5 = Temperature sensor
2.5 Commissioning
After wiring the unit, the physical address is assigned, and the application is programmed:
(1) Connect the programming interface with the bus, e.g. with MDT USB Interface.
(2) Switch-on bus voltage.
(3) Press the programming button (red programming LED lights up).
(4) Loading the physical address from the ETS software via the interface (red LED goes out as
soon as this has been successfully completed).
(5) Loading the application, with desired parameterization.
(6) If the device is enabled, you can test the requested functions (also possible by using the
ETS-Software).

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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3 Communication objects
3.1 Standard settings of the communication objects
Standard settings
No.
Name
Object function
Length
C
R
W
T
U
0
In operation
Status
1 Bit
X
X
X
1
Brightness
Send measured value
2 Byte
X
X
X
2
Brightness
Threshold value 1
1 Bit
1 Byte
X
X
X
3
Brightness
Threshold value 2
1 Bit
1 Byte
X
X
X
4
Brightness
Lock object: Threshold values
1 Bit
X
X
X
5
Twilight
Send measured value
2 Byte
X
X
X
6
Twilight
Switchover Day/Night
1 Bit
X
X
X
7
Twilight
Blinds Up/Down
1 Bit
X
X
X
8
Twilight
Lock object: Blinds Up/Down
1 Bit
X
X
X
9
Temperature
Send measured value
2 Byte
X
X
X
10
Temperature
Threshold value 1
1 Bit
1 Byte
X
X
X
11
Temperature
Threshold value 2
1 Bit
1 Byte
X
X
X
Table 1: Communication objects –Standard settings
The table above shows the preset default settings. The priority of the individual communications
objects and the flags can be adjusted by the user as required. The flags assign the communication
objects their respective tasks in programming, where “C”stands for communication, “R”for read,
“W”for write, “T”for transmit and “U”for update.

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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4 Reference ETS-Parameter
4.1 General Settings
The following figure shows the menu for the general settings:
Figure 3: General settings
The following table shows the possible settings:
ETS-Text
Dynamic range
[Default value]
Comment
Startup time
0 … 240 s
[1 s]
Sets the time between restart and
functional start-up of the device.
Send „In operation“ cyclically
not active
10 min –24 h
Activation of a cyclic "in operation"
telegram.
Light sensor
•not active
•active
Activation/deactivation of the menu
for the light sensor.
Twilight sensor
•not active
•active
Activation/deactivation of the menu
for the twilight sensor.
Temperature sensor
•not active
•active
Activation/deactivation of the menu
for the temperature sensor.
Table 2: General settings
Startup time
This time defines when the unit "boots up" after a restart (reset, reprogramming, bus voltage
recovery). This can be important if, for example, a bus reset is carried out. If there are many units
on a line, all units would start at the same time and load the bus. With a variable time, the units can
thus start differently.
„In operation“
The "In operation" object is used to show on the bus that the unit is "alive". If activated, an “ON”
telegram is sent cyclically.
Activating the various sensors opens a corresponding menu in each case, in which they can then be
individually set.
The table shows the general communications objects:
Number
Name/Object function
Length
Usage
0
In operation –Status
1 Bit
Sending a cyclic "In operation" telegram
Table 3: General communication object

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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4.2 Light sensor
The following settings are available for this menu:
Figure 4: Settings –Light sensor
The following table shows the possible settings:
ETS-Text
Dynamic range
[Default value]
Comment
Send measured value
•not active, only on request
•on change
•cyclic
•on change and cyclic
Setting of the sending condition for
the measured value.
Send on change of …
•10%
•20%
•30%
Setting at which change the measured
value should be sent.
Only with selection "on change ..."
Send cyclically
every …
10 s –60 min
[5 min]
Setting whether and at what interval
the measured value is sent cyclically.
Only with selection „… cyclic“.

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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Threshold value 1 / 2
•not active
•twilight 10-1000 Lux
•brightness 1-10 kLux
Activation of a threshold value and
within which range this should be set.
Upper limit
1 … 100 (x 10 Lux)
[10]
[20]
(x 10 Lux) with selection "twilight"
Setting of the upper limit for the
threshold value.
(kLux) with selection „brightness“.
1 … 100 (kLux)
[35]
[40]
Minimum duration of
exceedance
not active, 10 s –60 min
[10 min]
Setting for how long the upper limit
value must be exceeded at least to
trigger a telegram.
Lower limit
1 … 100 (x 10 Lux)
[5]
[15]
(x 10 Lux) with selection "twilight"
Setting of the lower limit for the
threshold value.
(kLux) with selection „brightness“.
1 … 100 (kLux)
[30]
[35]
Minimum duration of
undercutting
not active, 10 s –60 min
[30 min]
Setting for how long the value must
fall below the lower limit value to
trigger a telegram.
Datapoint type
•1 Bit DPT 1.001 Switch
•1 Byte DPT 17.001 Scene
number
Setting of the datapoint type that is to
be sent when exceeding or
undercutting.
Value when
exceeded
•not active
•ON
•OFF
Setting of the value to be sent when
the corresponding threshold value is
exceeded/undercut.
For DPT "Switch".
Value when
undercut
•not active
•ON
•OFF
Scene number when
exceeded
1 –64
[1]
Setting of the scene to be sent when
the corresponding threshold value is
exceeded/undercut.
For DPT „Scene number“.
Scene number when
undercut
1 –64
[2]
Send cyclically
every …
not active, 10 s –60 min
Setting whether and at what interval
the value or scene is to be sent
cyclically.
Reacts to lock object:
Threshold values
•not active
•active
Setting, if the threshold value reacts to
the lock object.
Table 4: Settings –Light sensor
Send measured value
By setting "not active, only on request", the measured value is not actively sent, but can be
queried externally via object. "on change" means that the measured value is actively sent on the
bus on a change. The value at which change is to be sent is defined with the setting under "Send on
change of ...".
The "cyclic" setting can be used to set the intervals at which the current measured value is to be
sent. It is also sent if the value has not changed.
With the selection "on change and cyclic", both settings are reacted to accordingly.

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: [phone] • [e-mail] • www.mdt.de
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Threshold value 1 / 2
Two threshold values can be configured independently of each other. It is possible to adjust the
resolution of the brightness range. With the setting "twilight 10-1000 Lux", a threshold value can
be finely adjusted in a range of less than 1000 Lux (typical range for twilight).
With the setting "brightness 1-100 kLux", a threshold value can be set in a range from 1000 lux to
100000 lux (typical values for sunlight).
The threshold value is determined by one value each for the "Upper limit" and the "Lower limit".
To avoid frequent triggering, a minimum time can be set for exceeding and falling below the
threshold. This means that the set limit value must be permanently exceeded/undercut for this
time before a telegram is sent.
This avoids, for example, frequent movement of the sunshade when a cloud only darkens for a
short time.
Datapoint type
The selected datapoint type determines whether either “ON”or “OFF”telegrams (1 bit) or scenes
(1 byte) are sent when the threshold value is exceeded/undercut.
The determination is made via the parameters "Value/Scene number when exceeded/undercut".
In addition, it can be determined whether the telegrams are to be sent cyclically.
Reacts to lock object: Threshold values
The communication object 4 "Lock object: Threshold values" is permanently displayed. For both
threshold values, it can be decided in each case whether this should react to the lock object.
Example:
Set the parameter for threshold value 1 to "active" and for threshold value 2 to "not active".
If a "1" is now sent to the lock object, the lock only affects threshold value 1.
The lock is cancelled with a "0".
The following table shows the associated communication objects:
Number
Name/Object function
Length
Usage
1
Brightness –Send measured value
2 Byte
Sending the current measured value
2
Brightness –Threshold value 1
1 Bit
1 Byte
Sends a telegram when threshold value
1 is exceeded/undercut.
DTP depending on parameter setting.
3
Brightness –Threshold value 2
1 Bit
1 Byte
Sends a telegram when threshold value
2 is exceeded/undercut.
DTP depending on parameter setting.
4
Brightness –Lock object: Threshold
values
1 Bit
Set/unset a lock
Table 5: Communication objects –Light sensor