elsner elektronik P03/3-Modbus Quick Start Manual

EN
P03/3-Modbus & P03/3-Modbus-GPS
Weather Stations for Modbus
Technical specifications and installation instructions
Item numbers 30146 (P03/3-Modbus), 30147 (P03/3-Modbus-GPS)
1. Description
The P03/3-Modbus and P03/3-Modbus-GPS Weather Stations measure tem-
perature, wind speed and brightness (eastern, southern and western sun) and re-
cognize precipitation.
The P03/3-Modbus-GPS additionally receives the UTC signals (Universal Time
Coordinated) as well as the site coordinates via an integrated GPS receiver. The di-
rection of the sun (azimuth) as well as its height (elevation) are calculated and in-
dicated, too.
The devices are Modbus slaves with a RS485 interface and a RTU protocol. The
Modbus master, such as PC, SPS or MC can read the P03/3-Modbus(-GPS) We-
ather Stations measurement values with "Function 04h (Read Input Register)".
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
• P03/3-Modbus-GPS only: Integrated GPS receiver. Output of UTC
(Universal Time Coordinated), position (degree of longitude and latitude)
and position of the sun (azimuth, elevation)
1.0.1. Scope of delivery
• Weather station
1.1. Technical specifications
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%.
An appropriate power supply unit can be obtai-
ned from Elsner Elektronik
Cable cross-section Massive conductors of up to 0.8 mm²
Current max. 80 mA, residual ripple 10%
Interface RS485
Protocol RTU
RS485 bus load 1/8 unit load according to RS485 standard
RS485 driver performance min. 2.4 V at 54 Ohm bus load
(corresponds to 32 standard RS485 unit loads)
Heating rain sensor approx. 1.2 W
Measurement range tempera- -40...+80°C
ture
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°)
Measurement range brightness 0...99 000 lux
Resolution (brightness) 1 lux up to 300 lux
2 lux up to 1000 lux
20 lux up to 99 000 lux
Accuracy (brightness) ±15% at 30 ... 30 000 lux
Weather Stations P03/3-Modbus(-GPS)
The product conforms with the provisions of EU directives.
2. Installation and commissioning
2.1. Installation notes
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.
• Comply with the locally applicable directives, regulations and provisions
for electrical installation.
• De-energise all cables to be mounted and take safety precautions against
unintentional switch-on.
• Inspect the device for damage before installation. Only put undamaged
devices into operation.
• 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.
2.1.1. 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.
Wall
or
pole
Horizontal
North
South
Weather Stations P03/3-Modbus(-GPS) from version 2.0 • Version: 07.05.2021 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de • Technical Service: +49 (0) 7033 / 30945-250
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).
Fig. 3
The weather station must be mounted
in the horizontal transverse direction
(horizontally).
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.
2.2. Mounting the sensor
2.2.1. 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.
Fig. 5
When wall mounting: flat side on wall,
Collar
crescent-shaped collar upward.
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.
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:
Fitting to a pole with worm drive hose
clips
2.2.2. View of rear side and drill hole plan
Fig. 9 a+b
Drill hole plan
Dimensions of rear side
of housing with bra-
cket. Subject to change
for technical enhance-
ment.
Slot hole 7,5 x 5 mm
2.2.3. Preparing the sensor
Unsnap cover and
remove upwards
Fig. 10
1) Cover Snaps
2 Bottom part of hou-
sing
1
1
2