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P03/3-RS485-GPS/CET Weather Station

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P03/3-RS485-GPS/CET Weather Station

 • Version: 07.06.2021 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de • 

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

P03/3-RS485-GPS, P03/3-RS485-CET

Weather Station

Technical specifications and installation instructions

1.

Description

The 

P03/3-RS485-GPS/CET Weather Station

 measures temperature, wind

speed and brightness (eastern, southern and western sun). It recognizes precipita-
tion and receives the time signal with a GPS receiver. With the weather station P03/
3-RS485-GPS the international time signal UTC and position coordinates are out-
put. Direction (azimuth) and hight (elevation) of the sun are also calculated and
output. For the P03/3-RS485-CET Weather Station, the Central European Time
(CET) is output. The daylight savings time is adjusted automatically according to
the specifications for Central Europe.

The weather station sends the currently recorded weather data, date and time once
every second. This data flow can be received and analyzed by an end device such
as SPS, PC or MC.

Functions:

Brightness measurement

 with three separate sensors for east, south and 

west. Recognition of twilight/dawn

Wind measurement:

 The wind strength measurement takes place 

electronically and thus noiselessly and reliably, even during hail, snow and 
sub-zero temperatures. Even turbulent air and anabatic winds in the vicinity 
of the weather station are recorded

• Temperature measurement 

Heated 

precipitation sensor

 (1.2 watts): No false reports as a result of fog 

or dew. Dries quickly after precipitation has stopped

Sending cycle for data 1 second

Functions P03/3-RS485-GPS:

Integrated 

GPS receiver

. Output of UTC (Universal Time Coordinated), 

position (degree of longitude and latitude) and position of the sun (azimuth, 
elevation)

Functions P03/3-RS485-CET:

Integrated 

GPS receiver

. Output of CET (Central European Time), 

automatic adjustment of daylight savings time.

1.0.1. Scope of delivery

Weather station

1.1. Technical specifications

The product conforms with the provisions of EU directives.

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.

2.0.1. Installation position

Choose an installation position in the building where wind, rain and sun can be
measured unhindered by the sensors. The weather station must not be installed
underneath any structural parts from which water can still drip onto the rain sensor
after it has stopped raining or snowing. The weather station must not be shaded
by anything, such as building structures or trees. 

At least 60 cm of clearance must be left all round the weather station. This facilita-
tes correct wind speed measurement without eddies. The distance concurrently
prevents spray (raindrops hitting the device) or snow (snow penetration) from im-
pairing the measurement. It also does not allow birds to bite it.
Please take note that an extended awning does not shade the device from sun and
wind.

Temperature measurements can also be affected by external influences such as by
warming or cooling of the building structure on which the sensor is mounted, (sun-
light, heating or cold water pipes).

Magnetic fields, transmitters and interfering fields from electricity consumers (e.g.
fluorescent lamps, neon signs, switched-mode power supplies etc.) can interfere
with or even cut out reception of the GPS signal.

2.1. Mounting the sensor

2.1.1. Attaching the mount

The sensor comes with a combination wall/pole mount. The mount comes adhered
by adhesive strips to the rear side of the housing. Fasten the mount vertically onto
the wall or pole. 

2.1.2. View of rear side and drill hole plan 

Housing

Plastic material

Colour

White / translucent

Mounting

On-wall

Degree of protection

IP 44

Dimensions

approx. 96 × 77 × 118 (W × H × D, mm)

Weight approx. 

160 

g

Ambient temperature

Operation -30…+50°C, Storage -30…+70°C

Operating voltage

24 V DC ±10%.
A suitable power pack can be purchased from Elsner
Elektronik.

Cable cross-section

Massive conductors of up to 0.8 mm²

Current

max. 120 mA, residual ripple 10%

Data output

RS485

Heating rain sensor

approx. 1.2 W

Measurement range 
temperature

-40…+80°C

Resolution (temperature)

0.1°C

Accuracy (temperature)

±1.5°C at  -25…+80°C

Measurement range wind

0…35 m/s

Resolution (wind)

0,1 m/s

Accuracy (wind)

at ambient temperature -20…+50°C:
±22% of the measurement value when incident flow 
is from 45…315°
±15% of the measurement value when incident flow 
is from 90…270°
(Frontal incident flow corresponds to 180°)

Item numbers

30145 (P03/3-RS485-GPS)

30151 (P03/3-RS485-CET)

Measurement range 
brightness

0 … 99,000 lux

Resolution (brightness)

  1 lux up to 300 lux
  2 lux up to 1,000 lux
20 lux up to 99,000 lux

Accuracy (brightness)

±15% at 30 lux … 30,000 lux

Fig. 1
There must be at least 60 cm of space 
below, to the sides and in front of the 
weather station left from other ele-
ments (structures, construction parts, 
etc.).

60 cm

Fig. 2
The weather station must be mounted 
on a vertical wall (or a pole).

Wall

or

pole

Fig. 3
The weather station must be mounted 
in the horizontal transverse direction 
(horizontally).  

Horizontal

Fig. 4
For installation in the northern hemis-
phere, the weather station must be 
aligned to face south. 

For installation in the southern hemis-
phere, the weather station must be 
aligned to face north.

North

South

Fig. 5

When wall mounting: flat side on wall, 
crescent-shaped collar upward.

Collar

Fig. 6

When pole mounting: curved side on po-
le, collar downward.

Collar

Fig. 7
Different mounting arms are available 
from Elsner Elektronik as additional, op-
tional accessories for flexible installation 
of the weather station on a wall, pole or 
beam (pictures of sensors exemplary).
Example of the use of a mounting arm: 
Due to  flexible ball joints, the sensor can 
be brought into ideal position.

Fig. 8
Example use of the hinge arm mounting:
With the hinge arm mounting, the weat-
her station projects from beneath the 
roof overhang. Sun, wind and precipita-
tion can act upon the sensors without 
hindrance.

Fig. 9
Example use of the hinge arm mounting:
Fitting to a pole with worm drive hose 
clips

Langloch 7,5 x 5 mm

Fig. 10 a+b

Drill hole plan

Dimensions of rear side of housing with bra-
cket. Subject to change for technical enhan-
cement.

EN

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