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Weather Station P03/3-RS485 • Version: 11.10.2011 • Subject to technical alterations. Errors excepted. 

Description 

The P03/3-RS485 Weather Station measures temperature, wind speed and brightness 

(eastern, sothern and western sun). It recognizes precipitation and receives the DCF77 

radio signal for date and time.  

 

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. If the DCF signal cannot be received, the data is output approx. every 

1.35 seconds. 

 

The P03/3-RS485 has four connections. Data output is at terminals A and B. Terminals 1 

and 2 are for the power supply (24 V DC). The connections are 

not resistant to pole 

reversal

. Connecting them incorrectly 

will destroy

 the interface components

 

Functions:  

 

Brightness measurement

 with three separate sensors for east, south and west. 

Recognition of twilight/dawn with special filters  

 

Wind speed measurement

 by means of a nonwearing electronic sensor. No 

damage from storm or hail as with mechanical anemometers 

 

Temperature measurement  

 

Heated

 precipitation sensor

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

dew. Dries quickly after precipitation has stopped 

 

Integrated 

DCF77 radio clock receiver

  

 

Technical data 

Housing:  

Plastic material 

Colour:  

White / translucent 

Mounting:  

On-wall 

Protection category:  

IP 44 

Dimensions:  

approx. 96 x 77 x 118 (W x H x D, mm) 

Weight:  

approx. 160 g 

Ambient temperature:  

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

Operating voltage:  

24 V DC 

Current:  

max. 125 mA, residual ripple 10% 

If switching power supply units are applied, the quality of the radio clock reception may 

be influenced. 

Data output:  

RS485 

Heating rain sensor:  

approx. 1.2 W

Содержание P03/3-RS485

Страница 1: ...terface Technical data and notes for installation Elsner Elektronik GmbH Control and Automation Engineering Herdweg 7 D 75391 Gechingen Germany Phone 49 0 70 56 93 97 0 Fax 49 0 70 56 93 97 20 info elsner elektronik de www elsner elektronik de ...

Страница 2: ...them incorrectly will destroy the interface components Functions Brightness measurement with three separate sensors for east south and west Recognition of twilight dawn with special filters Wind speed measurement by means of a nonwearing electronic sensor No damage from storm or hail as with mechanical anemometers Temperature measurement Heated precipitation sensor 1 2 watts No false reports as a ...

Страница 3: ...5 at 0 15 m s at an angle of attack of 45 pole mounting Measurement range brightness 0 99 000 lux Resolution 1 lux at 0 120 lux 2 lux at 121 1 046 lux 63 lux at 1 047 52 363 lux 423 lux at 52 364 99 000 lux Accuracy 35 The following standards were referenced with regard to evaluating electromagnetic compatibility of the product EN 60730 1 2000 11 A11 2002 The product has been tested by an accredit...

Страница 4: ...011 Subject to technical alterations Errors excepted 4 PCB layout Fig 1 1 Socket for connecting cables to rain sensor in housing cover 2 Socket for connection 1 24 V DC 2 GND A Data B Data 3 DCF77 reception control LED 4 DCF77 antenna set screw ...

Страница 5: ...st for extended periods Therefore only use the output time for synchronization of another clock working in parallel in the system For this the second 0 should be used Byte No Char Meaning 1 W Weather data start 2 OT Sign Outdoor temperature sign 3 OT 1st digit Outdoor temperature 1st digit tens in C 4 OT 2nd digit Outdoor temperature 2nd digit ones 5 OT Point Outdoor temperature point 6 OT 3rd dig...

Страница 6: ...digit thousands 37 Checksum 2nd digit Checksum 2nd digit hundreds 38 Checksum 3rd digit Checksum 3rd digit tens 39 Checksum 4th digit Checksum 4th digit ones 40 End End 0x03 Installation and first use The weather station may only be installed tested put into operation and troubleshot by a person qualified to do so When connecting the weather station do not connect any live wires switch off the mai...

Страница 7: ...snowing The weather station must not be shaded by anything such as building structures or trees There must be at least 60 cm of free space underneath the weather station to allow it to measure the wind correctly and to prevent it from being snowed in when it snows Please ensure that the extended awning does not cast shade on the unit and that this is not protected from the wind Temperature measure...

Страница 8: ... must be mounted horizon tally in the lateral direction Attaching the mount The weather station 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 crescent shaped collar upward Fig 6 When pole mounting curved side on pole collar downward ...

Страница 9: ... 9 Fig 7 An additional optional accessory available from Elsner Elektronik is an articulated arm for flexible wall pole or beam mounting of the weather station View of rear side and drill hole plan Fig 8 a Dimensions of rear side of housing with bracket Subject to change for technical enhancement ...

Страница 10: ... right along the bottom edge see Fig 9 Remove the weather station cover Proceed carefully so as not to pull off the wire connecting the PCB in the bottom part with the rain sensor in the cover wire with push connector Push the connection cable through the rubber seal on the bottom of the weather station and push the power and bus cables onto their designated terminals The connection is by typical ...

Страница 11: ...must snap in on the left and right with a definite click Fig 10 Make sure the cover and bottom part are properly snapped together This picture is looking at the closed weather station from underneath Fig 11 Push the housing from above into the fastened mount The bumps on the mount must snap into the rails in the housing To remove it the weather station can be simply pulled upwards out of the mount...

Страница 12: ...lying the power before the wind measurement will be output Maintenance The weather station must be checked for dirt on a regular twice yearly basis and cleaned if necessary A dirty weather station can lead to strange results such as the wind sensor failing to work the station constantly announcing rain or failure to detect sunlight ...

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