elsner elektronik KNX RW Technical Specifications And Installation Instructions

EN

Rain/Wind Sensor KNX RW

Technical specifications and installation instructions

Elsner Elektronik GmbH Control and Automation Engineering

Herdweg 7
D – 75391 Gechingen Phone [phone] / 93 97-0 [e-mail]
Germany Fax [phone] / 93 97-20 www.elsner-elektronik.de

2 Description

1. Description

The Rain/Wind Sensor KNX RW measures precipitation and wind speed and trans­fers the values to the KNX system. Four switching outputs with three adjustable
threshold values as well as additional AND and OR logic gates are available. The sen­sor system, the evaluation electronics and the electronics of the bus connection are
mounted in a compact housing.

Functions:

• Precipitation perception: The surface of the sensor is heated so that only

drops and flakes are recognised as precipitation but not fog or dew. If it stops
raining or snowing, the sensor dries quickly and the precipitation message
ends

• 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

• 4 switching outputs, 3 with adjustable threshold values (Threshold values

can be set by parameter or via communication objects)

• 8 AND and 8 OR logic gates with each 4 inputs. Every switching incident as

well as 8 logic inputs (in the form of communication objects) may be used as
inputs for the logic gates. The output of each gate may optionally be configured
as 1 bit or 2 x 8 bits

Configuration is made using the KNX software ETS. The programme file (format
VD2), the data sheet and the manual can be downloaded from the Elsner Elektronik
homepage on www.elsner-elektronik.de in the “Service” menu.

1.1. Technical specifications

Housing Plastic material

Colour White/ translucent

Mounting On-wall

Protection category IP 44

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

Weight 230 V AC version: approx. 240 g,

Ambient temperature Operation -30…+50°C, storage -30…+70°C

Operating voltage Available for 230 V AC or 24 V DC (20 V AC).

Cable cross-section Massive conductors of up to 1.5 mm² or conductors

Current 230 V AC version: max. 20 mA, 24 V DC version max.

Data output KNX +/- bus terminal plug

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

24 V DC version: approx. 170 g

An appropriate 20 V AC power supply unit can be
obtained from Elsner Elektronik.

with fine wires

100 mA, residual ripple 10%

3 Installation and commissioning

BCU type Own micro controller

PEI type 0

Group addresses max. 254

Allocations max. 255

Commmunication objects 81

Heating rain sensor approx. 1,2 W (230 V and 24 V)

Measurement range wind 0...70 m/s

Resolution (wind) <10% of the measured value

Accuracy (wind) ±25% at 0...15m/s, at an angle of attack of 45°,

The following standards have been considered for the evaluation of the product in
terms of electro magnetic compatibility:
Transient emissions:

• EN 60730-1:2000 Section EMV (23, 26, H23, H26) (threshold category: B)

• EN 50090-2-2:1996-11 + A1:2002-01 (threshold category: B)

• EN 61000-6-3:2001 (threshold category: B)
Interference resistance:

• EN 60730-1:2000 Section EMV (23, 26, H23, H26)

• EN 50090-2-2:1996-11 + A1:2002-01

• EN 61000-6-1:2004
The product has been tested for the above mentioned standards by an accredited EMV
laboratory.

pole mounting

2. Installation and commissioning

2.1. Notes on installation

Warning, mains voltage!
National legal regulations are to be observed.

Installation, inspection, commissioning and troubleshooting of the
device must only be carried out by a competent electrician.

Disconnect all lines to be assembled, and take safety precautions against accidental
switch-on.

The device is exclusively intended for appropriate use. With each inappropriate change
or non-observance of the instructions for use, any warranty or guarantee claim will be
void.

After unpacking the device, check immediately for any mechanical damages. In case of
transport damage, this must immediately notified to the supplier.

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

4 Installation and commissioning

Fig. 1
The rain/wind sensor must be mounted onto
a vertical wall (or pole).

Wall
or
pole

Fig. 2
The rain/wind sensor must be mounted hori­zontally in the lateral direction.

Horizontal

If damaged, the device must not be put into operation.

If an operation without risk may supposedly not be guaranteed, the device must be put
out of operation and be secured against accidental operation.

The device must only be operated as stationary system, i.e. only in a fitted state and
after completion of all installation and start-up works, and only in the environment in­tended for this purpose.

Elsner Elektronik does not assume any liability for changes in standards after publica­tion of this instruction manual.

2.2. Location

Select an assembly location at the building where precipitation and wind may be coll­ected by the sensors unobstructedly. Do not assemble any construction components
above the sensor from where water may drop on to the rain and wind sensor after it
has stopped raining or snowing. At least 60 cm of free space must be left beneath the
device to enable correct wind measurement and prevent snowing in when there is
snow.

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

5 Installation and commissioning

Fig. 3
When wall mounting: flat side on wall, crescent­shaped collar upward.

Collar

Fig. 4
When pole mounting: curved side on pole, collar
downward.

Collar

Fig. 5
An additional, optional accessory available from
Elsner Elektronik is an articulated arm for flexib­le wall, pole or beam mounting of the sensor.

2.3. Mounting the sensor

2.3.1. 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.

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

6 Installation and commissioning

Fig. 6
Example uses of the hinge arm mounting: With
the hinge arm mounting, the sensor peeps out
from beneath the roof overhang.

Fig. 7
Example uses of the hinge arm mounting: Fit­ting to a pole with worm drive hose clips

Langloch 7,5 x 5 mm

Fig. 8 a+b
Drill hole plan

Dimensions of rear side of
housing with bracket. Sub­ject to change for technical
enhancement.

2.3.2. View of rear side and drill hole plan

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

2.3.3. Preparing the sensor

Fig. 9
1 Cover with rain sensor

2) Cover Snaps
3 Bottom part of housing

2
3

Unsnap cover and
remove upwards

1

7 Installation and commissioning

The sensor cover snaps in on the left and right along the bottom edge (see Fig.). Re­move the 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 (soldered cable connection in case of
230 V AC version, cable with plug in case of 24 V DC version).

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

8 Installation and commissioning

Fig. 10

1) Cable connection to the rain
sensor in the housing cover

2) Opening for the cable for the
voltage supply

3) Tension clamp for voltage
supply (230 V AC), suitable for
massive conductors of up to

1.5 mm² or conductors with
fine wires

4) Slot for KNX clamp +/-

5 Opening for the bus cable

6) Programming pushbutton for
the teach-in of the device

7) Programming LED

23

4

6
7

5

1

Lead the cable for the voltage supply and bus connection through the rubber seals on
the bottom of the device and connect Voltage L/N and Bus +/- to the terminals provi­ded.

For 24V devices the connection cable must be plugged in between the cover and circuit
board.

2.3.4. PCB Layout

230 V AC version

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

24 V DC version

Fig. 11
1 Slot for cable connection to

the rain sensor in the housing
cover

2 Tension clamp for voltage

supply (24 V DC/20 V AC), sui­table for massive conductors
of up to 1.5 mm² or conduc­tors with fine wires

3 Opening for the cable for the

voltage supply and for the bus
cable

4Slot for KNX clamp +/­5 Programming pushbutton for

the teach-in of the device

6 Programming LED

1 2

4

3

5
6

Fig. 12
Make sure the cover and bottom part are pro­perly snapped together! This picture is loo­king at the closed sensor from underneath.

Fastening

2.3.5. Mounting the sensor

9 Installation and commissioning

Close the housing by putting the cover back over the bottom part. The cover must snap
in on the left and right with a definite “click”.

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.

10 Maintenance

Fig. 13
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 sensor can be simply pulled upwards out of the mount, against the
resistance of the fastening.

2.4. Notes on mounting and commissioning

Do not open the device if water (rain) might ingress: even some drops might damage
the electronic system.

Observe the correct connections. Incorrect connections may destroy the sensor or con­nected electronic devices.

The measured wind value and thus all other wind switching outputs may only be sup­plied 60 seconds after the supply voltage has been connected.

After the auxiliary voltage has been applied, the device will enter an initialisation phase
lasting 5 seconds. During this phase no information can be received via the bus.

3. Maintenance

The sensor must regularly be checked for dirt twice a year and cleaned if necessary. In
case of severe dirt, the sensor may not work properly anymore.

As a precaution, the device should always be separated from
power supply for maintenance works (e.g. deactivate or remove
fuse).

Rain/Wind Sensor KNX RW • Date of issue: 05.11.2010 • Technical changes reserved. Errors reserved.