Schneider Electric KNX- Weather Combi-Sensor DCF-77 Operating instructions

© Merten2005V6636-563-0001/08
GB
Mounting the weather combi-sensor
Weather combi-sensor DCF-77
Operating instructions
Art. no. MTN663692
How to put the weather combi-sensor
into operation
|
Note
The sensor should not be influenced by obstructions or shadowing effects on any side.
|
Note
When installing the device in front of a wall, a minimum distance of 0.5 m should be maintained so
that the sensors are not influenced and inaccurate measurement values are avoided
After connecting and switching on voltage, the combisensor must be logged on to the bus weather station.
1 Orient the combi-sensor using a compass such so
that the precipitation window faces North.
A
N
A Reed contact
1 Hold the magnets supplied against the integral reed
contact (A), so that five short tones are heard.
Necessary accessories
– Weather station REG-K/4-gang (Art. no. MTN682991)
The allocation of the brightness sensors according to the
compass points is thus guaranteed.
– Power supply REG, AC 24 V/1 A
(Art. no. MTN663529)
The combi-sensor now sends data to the weather station. The weather station and combi-sensor then carry out
a reset. The combi-sensor signals this with a short tone.
The devices are now ready for operation.
Antenna orientation
For your safety
After registering the combi-sensor on the weather station
check the reception of the DCF77 time signal.
¼
1 Hold the magnets supplied against the integral reed
contact (A), so that five short tones are heard. Hold
the magnets in position.
DANGER
Risk of fatal injury from electrical current.
The unit may only be installed and connected by
skilled electicians. Observe the regulations valid
in the country of use, as well as the valid KNX guidelines.
The combi-sensor now signals fault-free reception of the
time signal with short tones (one every second; a brief
pause for each full minute).
2 Fasten the combi-sensor on a tubular mast (Ø 35 –
50 mm) using the Nirosta mounting bracket supplied.
The weather combi-sensor is used for measuring wind
speed, precipitation, brightness and twilight. It is possible to measure brightness for the East, South and West
compass points separately.
3 Connect the combi-sensor to the bus weather station.
The combi-sensor comprises a DCF77 receiver with
which German legal time (CET) can be received and sent
to the bus (e.g. to synchronise bus clocks).
The combi-sensor is heated to guarantee fault-free operation in frosty weather.
A
The combi-sensor requires an external 24 V power supply.
This can additionally also supply or heat other sensors
and supply the bus weather station or a connected analogue input module.
The weather combi-sensor is connected directly to a bus
weather station (art. no. MTN682991) which then further
processes the measured data and sends it to the bus as
switching or value telegrams. This enables bus devices
(info displays, visualisation software, measured-value
displays) to access the control processes, generate signals or control weather-dependent processes. Areas of
application include building technology, control technology, greenhouse technology or the further processing of
measured data in control and operating units.
B
(1) (2) (3) (4) (5)(6)
2 Align the antenna with a small screwdriver so that a
signal sounds every second.
3 Remove the magnets. The combi-sensor then acknowledges this with a 5 second-long tone.
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Note
as part of the maintenance of the combi-sensor
make sure that the housing area where the brightness and precipitation sensors are located (side
and upper section of the device) is kept as free of
dust as possible so that inaccurate measurement
values are not recorded. Rain mainly ensures that
the housing surfaces remain clean.
|
Note
In order to guarantee fault-free wind speed
measurements, the wind wheel must turn freely.
This can be checked and will be apparent at low
wind speeds. We recommend you have the wind
wheel checked by the manufacturer if it does not
turn, or only turns at higher wind speeds.
D
C
A Weather station REG-K/4-gang
B System bus
C Weather combi-sensor/DCF-77
D Power supply REG, AC 24 V/1 A
(1) pink:
(2) grey:
(3) green:
(4) yellow:
(5) white:
(6) brown:
24 V AC, 600 mA power supply
Earth power supply
System voltage 24 V DC, > 15 mA
data
bus clock
System earth
V6636-563-00 01/08
Getting to know the weather combisensor
If the tones cannot be heard, or can only be heard irregularly, the receiving antenna must be aligned. The antenna can be accessed underneath the combi-sensor. The
antenna can be rotated by 45°.
Technical data
Power supply
Sensor unit (incl. heating):
24 V AC/DC ± 15%, 50/60 Hz
Power consumption: max. 600 mA
Power consumption: max. 14,4 W (sensors and heating)
Incoming cable:
max. 14,4 W (sensors and heating)
28 mA max. (14 bus loads)
Connection
Connecting cable: LiYCY, 6 x 0.25 mm2
Length:
10 m, 50 m max.
Ambient conditions
Ambient
temperature:
-40 °C to +60 °C, non-icing
Storage/transport
temperature:
-40 °C to +60 °C
Humidity:
outside the building
Housing
Type of protection: IP 65 in working position as per
DIN EN 60529
Protection class:
III
Dimensions (ØxH): 130 x approx. 130 mm (without
mounting bracket)
Type of installation:
Mounting bracket on mast or
wall
Weight:
approx. 330 g (without mounting
bracket)
Sensor signals
Wind speed
Measuring range: 1 – 40 m/s
Accuracy:
0.5 m/s
Precipitation
Measuring range: Precipitation yes / no
Sensitivity:
Fine drizzle
Switch-on delay:
approx. 3 droplets of precipitation
Switch-off delay:
approx. 2 minutes
Brightness
Measuring range: 0 – 110 k lux
Spectral range:
700 – 1050 nm
Resolution:
10 bit
Cardinal points:
East, South, West
Twilight
Measuring range: 0 - 674 lux
Resolution:
10 bit
Schneider Electric Industries SAS
If you have technical questions, please contact the Customer Care Center in your country.
www.schneider-electric.com
V6636-563-00 01/08
This product must be installed, connected and used in
compliance with prevailing standards and/or installation
regulations. As standards, specifications and designs
develop from time to time, always ask for confirmation of
the information given in this publication.

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