Brochure

Wide-ranging applications
Weather stations are used to control solar
protection systems of all kinds (roller shut-
ters, blinds, awnings, electric windows,
etc.) via appropriate solar protection actua-
tors. The devices record weather data such
as temperature, brghtness and wind. The
weather station GPS AP / records
additionally rain and is able to work as
master clock, as the built-in GPS receiver
is a reliable reference for time and date
within the KNX network. At the same time,
the GPS receiver also determines the geo
-
graphical location required for calculating
the position of the sun.
Optimal solar protection control
Natural sunlight and pleasant lighting con-
ditions enhance user comfort in rooms and
houses. To ensure in-room users are not
dazzled by the sun and still ensure optimum
use of daylight, blind slats can be precisely
adjusted with the automatic sun tracking
system offered via the weather station GPS
AP /. Up to eight façades can be con-
trolled independently of each other.
Safety for blinds and awnings
The built-in wind wheel allows precise
wind speed measurement. This means
that blinds, awnings and other wind-sen-
sitive curtains can be optimally protected
against damage by automatically moving
them into a safety position in the event
of excessive wind.
Highlights
• Individually adaptable controls through six
integrated logic moduls
• Precise wind speed measurement using a wind
wheel
• Easy installation on external facades or a pole
Highlights of the Weather station
GPS AP /
• Determine the precise location via a built-in
GPS module
• Ideal use of daylight by adapting the solar
protection according to the current sun position
All key data at a glance
Technical data
Selection and order data
Type Product Title DT Order mo. PU (Unit,
set M)
PS/P unit PG Weight per
PU (kg)
Price
AP 257 / 61 Weather station GPS AP 257/61 A 5WG1 257-3AB61 1 1 0.325
AP 257 / 51 Weather station AP 257/51 A 5WG1 257-3AB51 1 1 0.3
Weather station GPS AP 257/61
• Sensor for measuring wind speed, measuring range 2 – 30 m/s
• Three independent brightness sensors, measuring range
1 – 100000 Lux
• Consideration of up to two external brightness sensors
• Outdoor temperature sensor, measuring range – 30 … + 60°C
• Heated precipitation sensor
• Transmission of date and time via the bus
• Transmission of GPS position via the bus
• Transmission of all measurement readings via the bus
• Monitoring of all measurement readings
• Input of the geographical location of the installation site via the
entry of longitude and latitude or automatic detection via GPS
• Calculation and transmission of the angle data (azimuth and
elevation) for current position of the sun
• Consideration of the alignment of up to 8 façades and auto matic
activation / deactivation of the solar protection of a façade during
the time in which the sun shines on the respective façade
• Sun tracking control of the slats position for solar protection, so
that no direct sunshine, but as much diffuse daylight as possible
reaches the room
• Safety alarm for deactivating the solar protection, initiated by
an external safety object or by logical AND/ OR operations of the
measured weather data
• 4 threshold switches, independent of the weather data, each with
2 output objects
• 6 logical AND, OR or XOR operations, independent of the weather
data, of respectively up to 4 input objects and each with 2 output
objects
• External power supply of the heating for the precipitation sensor
via 24 V DC, 210 mA
• Feed of the additional auxiliary power supply via the white / yellow
twisted pair of the bus cable
• Integrated bus coupling unit, bus connection via a bus terminal
block
• Compact unit for mast or wall mounting, including mast fixture
for diameter 48 – 60 mm
Weather station AP 257/51
• Sensor for measuring wind speed, measuring range 2 – 30 m/s
• Three independent brightness sensors, measuring range
1 – 100000 Lux
• Consideration of up to two external brightness sensors
• Outdoor temperature sensor, measuring range – 30 … + 60°C
• Transmission of all measurement readings via the bus
• Monitoring of all measurement readings
• Consideration of the alignment of up to 3 façades and automatic
activation / deactivation of the solar protection of a façade during
the time in which the sun shines on the respective façade
• Safety alarm for deactivating the solar protection, initiated by
an external safety object or by logical AND/ OR operations of the
measured weather data
• 4 threshold switches, independant of the weather data, each
with 2 output objects
• 6 logical AND, OR or XOR operations, independant of the whether
data, of respectively up to 4 input objects and each with 2 output
objects
• Integrated bus coupling unit, bus connection via a bus terminal
block
• Compact unit for mast or wall mounting, including mast fixture
for diameter 48 – 60 mm
The automatic sun position
tracking, using the weather station
GPS AP /, works as follows:
For glare-free use of daylight, the
slats of the blinds are not completely
closed, but adjusted to the sun
position and automatically config-
ured such as to ensure the sun
cannot shine directly into the room.
However, diffuse daylight can still
enter the room thanks to the spaces
between the slats and boost the
level of glare-free room lighting –
saving electrical energy.
Glare-free use of daylight thanks to automatic sun position tracking
Collect and evaluate weather data and GPS signals
 

Total reflection
of direct sunshine

Portion from
diffuse daylight


Temperature Brightness Wind Rain
The weather stations record weather data such as
temperature, wind speed and brightness. The weather
station GPS AP / can also detect rain. Various
evaluations can be configured via the ETS. These
can be used for partial tasks (e.g. pure brightness
threshold) or any combination of measured values.
The GPS module integrated in the
weather station GPS AP / recognizes
the GPS coordinates, namely the longi-
tude and latitude of the location, which
allows the solar protection to be auto-
matically adjusted according to the
current position of the sun. The GPS
module also recognizes the current date
and time. This allows the weather station
GPS to assume the function of a master
clock in a KNX system.
Location Time and Date