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Cala KNX T 201/202 Sunblind push button

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Cala KNX T 201/202 Sunblind push button

 • Version: 04.10.2021 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de • 

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

Cala KNX T 201 Sunblind,

Cala KNX T 202 Sunblind

Temperature Controller,

Button for Shading

Technical specifications and installation instructions

1.

Description

The 

Cala KNX T 201/202 Sunblind 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 temperature and solar protection. Whi-
te LEDs are integrated in these areas and their behaviour can be adjusted.

A temperature sensor is integrated into 

Cala KNX T 201/202 Sunblind

. An ex-

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

The 

Cala KNX T 201/202 Sunblind

 has a PI controller for heating and cooling.

The setpoint 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 temperature control

 with 2 areas (warmer, cooler)

LEDs 

can be set. All LEDs Off, all LEDs as ambient lighting, all LEDs 

individually controllable

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

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

2 AND and 2 OR logic gates

 each with 4 inputs. 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 T 201 Sunblind:

1 operating zone for blinds

, awnings, shutters or windows with 2 areas 

(up/down with short/long distinction)

Additional functions Cala KNX T 202 Sunblind:

2 operating zones for blinds

, awnings, shutters or windows with 2 areas 

(up/down with short/long distinction)

Configuration is made using the KNX software as of ETS 5. The 

product file

 can

be downloaded from the ETS online catalogue and the Elsner Elektronik website
on 

www.elsner-elektronik.de

 in the “Service” menu. There you will also find

the product manual. 

1.0.1. Area function

If the area function in ETS has been activated, another function is available along-
side 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 ti-
me.

1.1. Scope of delivery

Push button in casing

Base plate

Additionally

 required (not included in the deliverables):

Device socket according to DIN 49073 

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

1.2. Technical specifications

The product conforms with the provisions of EU guidelines.

1.2.1. 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 ac-

curacy of the sensor (offset).

When 

measuring temperature

, the self-heating of the device is compensated.

2.

Installation and commissioning

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

CAUTION!
Live voltage! 

There are unprotected live components inside the device.

• Inspect the device for damage before installation. Only put undamaged 
devices into operation. 
• Comply with the locally applicable directives, regulations and provisions 
for electrical installation. 
• Immediately take the device or system out of service and secure it against 
unintentional switch-on if risk-free operation is no longer guaranteed.

Use the device exclusively for building automation and observe the operating ins-
tructions. Improper use, modifications to the device or failure to observe the ope-
rating instructions will invalidate any warranty or guarantee claims.
Operate the device only as a fixed-site installation, i.e. only in assembled condition
and after conclusion of all installation and operational start-up tasks, and only in
the surroundings designated for it.
Elsner Elektronik is not liable for any changes in norms and standards which may
occur after publication of these operating instructions.

2.1. Installation position

The 

Cala KNX T 201/202 Sunblind push button

 is installed on a device socket.

May be installed and operated in dry interior rooms only. 

When selecting an installation location, ensure that the measurement results are
affected as little as possible by external influences. Possible sources of interference
include:

Direct sunlight

Drafts from windows and doors

Draft from ducts which lead from other rooms or from the outside to the 
junction box in which the sensor is mounted

Warming or cooling of the building structure on which the sensor is 
mounted, e.g. due to sunlight, heating or cold water pipes

Connection lines and ducts which lead from warmer or colder areas to the 
sensor

Measurement variations from permanent sources of interference can be corrected
in the ETS in order to ensure the specified accuracy of the sensor (offset).

2.2. Composition of the device

2.3. Installation of the sensor

First install the windproof socket with feed line. Seal the inlet tubes as well, in order
to prevent draughts.
Then screw the base plate to the socket and place the switch program frame. Con-
nect the bus cable +/- to the plug (black-red).
Insert the device firmly onto the metal frame using the catches so that the device
and the housing are fixed together.

3.

Commissioning

Never expose the device to water (e.g. rain) or dust. This can damage the electro-
nics. You must not exceed a relative humidity of 95%. Avoid condensation.

After the bus voltage has been applied, the device will enter an initialisation phase
lasting a few seconds. During this phase no information can be received or sent via
the bus.

Cala KNX T 202 Sunblind:
Item numbers
71050 (white),
71052 (black)

Cala KNX T 201 Sunblind:
Item numbers
70990 (white),
70992 (black)

Casing

Genuine glass, plastic

Colours

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

Installation

on device socket according to DIN 49073

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

Operating 0…+55°C, storage -30…+85°C

Ambient humidity

5…95% RH, avoid condensation

Operating voltage

KNX bus voltage

Bus current

max. 20 mA

Data output

KNX +/- Bus plug-in terminal

Group addresses

max. 167

Allocations

max. 167

Communication 
objects

Cala KNX T 201 Sunblind: 92
Cala KNX T 202 Sunblind: 98

Temperature measu-
rement range

0…+55°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

Fig. 2: Sectional drawing.
The 

Cala KNX T 201/202 Sunblind 

push button

 fits in a standard connec-

tor socket (Ø 60 mm, depth 42 mm). 
The frame is not included in the delive-
ry!

Installation depth

27 mm

Construction depth

10 mm

2

3

1

1

1

1

2

3

3

Cala KNX T 201 Sunblind

Cala KNX T 202 Sunblind

Fig. 3: Front
1 Ventilation slit (top and bottom)
2 „Temperature“ area with 2 touch surfaces and temperature display
3 „Sun protection/drive“ area with 2 touch surfaces per channel

Fig. 4: Back
1 Base frame
2 KNX terminal BUS +/-
3 Programming button (reces-

sed) for teaching the device

4 Programming LED (recessed)
5 Catches

5

1

3

2

4

EN

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