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Cala KNX MultiTouch T push button

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Cala KNX MultiTouch T push button

 • Version: 03.02.2021 • from version 0.1.9 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de • 

Technical Service: +49 (0) 7033 / 30945-250

EN

Cala KNX MultiTouch T Light/Sunblind

Cala KNX MultiTouch T Light/Scenes

Cala KNX MultiTouch T Light

Button for light, drive, scenes

and temperature control

Technical specifications and installation instructions

1.

Description

The 

Cala KNX MultiTouch T push button

 has touch-sensitive buttons with

which functions can be called up in the KNX building bus system. The glass surface
is printed with areas for setting the light and temperature. Coloured LEDs (one white
LED in the light symbol, one red and one blue LED in the thermometer symbol and
three white LEDs each for level indication) are integrated in these areas and their be-
haviour can be adjusted. With 

Cala KNX MultiTouch T Light/Sunblind

, an area

for moving blinds/sunshades (up/down) is added, and with 

Cala KNX MultiTouch

T Light/Scenes

, an area for calling up scenes (3 scenes).

A temperature sensor is integrated into 

Cala KNX MultiTouch T

. An external tem-

perature reading can be received via the bus and processed with its own data to
create a total temperature (mixed value).

The 

Cala KNX MultiTouch T

 has a PI controller for heating and cooling. The set-

point temperature can be changed using the "+" and "-" touch buttons.

Communication objects can be linked via AND and OR logic gates.

The device is supplemented with a frame of the switch series used in the building,
and thus fits seamlessly into the interior fittings.

Functions:

Operating zone for light

 with 3 areas (switching and dimming)

Operating zone for temperature control

 with 3 areas (warmer, cooler, 

changeover heating/cooling)

A total of 9 areas, all of which can be assigned either to the intended bus 
functions or to other individual bus functions (switches, changeover 
switches, dimmers, blinds, awnings, shutters, windows, 8- or 16-bit encoders, 
scene call/saving)

LEDs 

can be set. All LEDs Off, all LEDs On, active LEDs Always On, all LEDs 

On for specific time after button pressed, active LEDs On for specific time after 
button pressed. Settable, as to whether LED flashes at block object value = 1. 
LED brightness can be pre-set for day and night

Area function

 when touching two or more push buttons. Can be configured 

as switch, selector switch, as 8 or 16 bit encoder or for scenario recall

Scene control. 

3 scene channels with 5 objects each

Temperature

 measurements.

 Mixed value

 from own measured value and 

external values (proportion can be set by percentage), output of minimum 
and maximum values

PI-controller for heating

 (one or two-level) and 

cooling

 (one or two-level) 

according to temperature. Regulation according to separate setpoints or 
basic setpoint temperature

4 AND and 4 OR logic gates

 each with 4 inputs. All switching events as 

well as 8 logic inputs (in the form of communications objects) can be used as 
inputs for the logic gates. The output from each gate can be configured 
optionally as 1-bit or 2 x 8-bit

Additional functions Cala KNX MultiTouch T Light/Sunblind:

Operating zone for blinds

, awnings, shutters or windows with 3 areas (up/

down with short/long distinction, driving position)

Additional functions Cala KNX MultiTouch T Light/Scenes:

Operating zone for scene call and saving

 with 3 areas for scenes

Configuration is made using the KNX software ETS 5. The 

product file

 can be dow-

nloaded from the ETS online catalogue and the Elsner Elektronik website on

www.elsner-elektronik.de

 in the “Service” menu.

1.0.1. Area function

If the area function in ETS has been activated, another function is available alongsi-
de the regular key functions. This is triggered by touching multiple keys, e.g. if you
touch the sensor with the palm of your hand.

Using the area function

If a key is pressed and another (different) key is touched within 0.2 seconds, the ac-
tion set in the ETS is performed for the area operation (See Fig. 1 a) and b)). The keys
are then blocked for 0.5 seconds.

Using the normal key function

If a key is pressed and no other key is touched within 0.2 seconds, the normal key
function is enabled/provided for 5 seconds (See Fig. 1 c) and d)). This is extended
for 5 seconds with each push of the button.

If the area function in the ETS is disabled, the keys can be used normally at any time.

1.0.2. Scope of delivery

Push button in casing

Base plate

Additionally

 required (not included in the deliverables):

Junction box Ø 60 mm, 42 mm deep 

Frame (for insert 55 x 55 mm), compatible to the switch scheme used in the 
building

1.1. Technical data

The product is compliant with the provisions of EU Directives.

1.1.1. Accuracy of the measurement

Measurement variations from permanent sources of interference (see chapter 

Ins-

tallation position

) can be corrected in the ETS in order to ensure the specified accu-

racy of the sensor (offset).

When 

measuring temperature

, the self-heating of the device is considered by the

electronics. The heating is compensated by the software.

2.

Installation and commissioning

2.1. Installation notes

Installation, testing, operational start-up and troubleshooting should 
only be performed by an electrician.

Cala KNX MultiTouch T 
Light/Sunblind:
Item numbers
70890 (white),
70892 (black)

Cala KNX MultiTouch T 
Light/Scenes:
Item numbers
70960 (white),
70962 (black)

Cala KNX MultiTouch T 
Light:
Item numbers
70950 (white),
70952 (black)

Casing

Genuine glass, plastic

Colours

• similar to RAL 9010 pure white 
• similar to RAL 9005 deep black

Assembly

Flush-mounted (wall installation in junction box 

Ø

 60 mm, 42 mm deep or cavity wall socket for 

burr hole 

Ø

 68 mm)

Degree of protection

IP 20

Dimensions

Housing approx. 55 x 55 (W x H, mm), 
Installation depth approx. 10 mm, 
Base plate approx. 71 x 71 (W x H, mm)

Total weight

approx. 50 g

Ambient temperature

Operation and storage -25…+85°C

Ambient humidity

max. 95% RH, avoid condensation

Operating voltage

KNX bus voltage

Bus current

max. 19 mA

Data output

KNX +/- Bus plug-in terminal

Group addresses

max. 205

Assignments

max. 205

Communication 
objects

Cala KNX MultiTouch T Light/Sunblind: 199
Cala KNX MultiTouch T Light/Scenes: 198
Cala KNX MultiTouch T Light: 198

Temperature measu-
rement range

-25…+85°C

Temperature resolu-
tion

0.1°C

Key function readiness

Key function readiness

Fig. 1

0s

0.2s

5.2s

Key Y

Key X

Key X

Design

Function Y

Key function readiness

Area function

Examples of normal key functions

0.5 s block

Key X

Design

Area function

Key Y

Design

Function X

a)

b)

c)

d)

Key X

Key Y

0.5 s block

Design

Area function

Area function examples

readiness

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