Conrad Electronic FS20 SR User manual

Version 12/06
OPERATING INSTRUCTIONS

Wireless rain sensor
„FS20 SR“
Item no. 62 30 18

2
Introduction
Dear customer,
Thank you for purchasing this product.
This product meets the requirements of both current European and national guidelines.
In order to preserve this condition and ensure the safe operation of the product we kindly ask
you to carefully follow these operating instructions!
Please read the operating instructions completely and observe the safety and operation notes
before using the product!
All company names and product names contained herein are trademarks of the
respective owners. All rights reserved.
Should you have any further questions, please contact our technical advisory service:
Germany: Tel. no.: +49 9604 / 40 88 80
Fax. no.: +49 9604 / 40 88 48
e-mail: [email protected]
Mon. to Thur. 8.00am to 4.30pm
Fri. 8.00am to 2.00pm


3
Table of contents
Page
1. Prescribed use ............................................................................................................. 4
2. Scope of delivery ......................................................................................................... 5
3. Explanation of icons ................................................................................................... 5
4. Safety instructions ...................................................................................................... 6
5. System features ........................................................................................................... 7
a) Functions ................................................................................................................ 7
b) Factory setting ........................................................................................................ 8
6. Installation .................................................................................................................... 9
a) General information ................................................................................................ 9
b) Orientation of the rain sensor ................................................................................ 9
c) Opening the casing .............................................................................................. 10
d) Connections and controls .................................................................................... 10
e) Power supply ........................................................................................................ 11
f) Connecting the relay ............................................................................................ 12
g) Installation ............................................................................................................. 13
7. Initial operation .......................................................................................................... 14
a) Quick installation with factory settings ................................................................ 14
b) Function test ......................................................................................................... 14
8. The FS20 address system ........................................................................................ 15
9. Programming/operation ........................................................................................... 20
a) Integrating the ‘FS20 SR’ into the address system ............................................ 20
b) Setting the house code ........................................................................................ 21
c) Setting the addresses ........................................................................................... 22
d) Manual switching, address transmission ............................................................. 23
e) Activating/deactivating channels ......................................................................... 23
f) Setting the transmit command ............................................................................. 24
g) Setting the on-time ............................................................................................... 25
h) Setting the interval time ........................................................................................ 26
i) Restoring the rain sensor’s factory settings ........................................................ 27
j) Programming the receiver’s timer ........................................................................ 28

4
Page
10. Information on the range .......................................................................................... 29
11. Handling ...................................................................................................................... 30
12. Cleaning ...................................................................................................................... 30
13. Disposal ...................................................................................................................... 31
14. Technical specifications .......................................................................................... 31
15. Declaration of conformity (DOC) ............................................................................. 31
1. Prescribed use
The sole purpose of the ‘FS20 SR’ wireless rain sensor is to remotely control the various
components of the FS20 wireless control system.
It can remotely control these devices on 2 channels (adjustable settings).
In addition, the timers of the corresponding FS20 receivers can be programmed from the rain
sensor.
Due to its form and functionality, it is suitable for use outdoors.
A DC or AC voltage of between 12-15V is required as a power supply (power consumption
approx. 200mA).
Any use other than the one described above may damage the product and can also increase
the risk of short-circuit, fire, electric shock, etc.
No part of the product may be modified or adapted and the casing must not be opened.
All the safety instructions and installation notes in this manual must be
observed without fail.

5
2. Scope of delivery
• Wireless rain sensor ‘FS20 SR’
• User manual
3. Explanation of icons
The icon with a lightning flash in a triangle is used to alert you to potential
personal injury hazards such as electric shock.
The icon with an exclamation mark in a triangle points to important instructions
in this user manual that must be observed.
The ‘hand’ symbol provides special information and advice on operating the
device.

6
4. Safety instructions
The product’s guarantee becomes invalid, if the product is damaged as
a result of the failure to observe these operating instructions! We do not
assume any liability for any resulting damages!
Nor do we assume liability for damage to property or personal injury
caused by improper use or failure to observe the safety instructions. In
such cases the product’s guarantee becomes invalid.
Dear customer, the following safety instructions are intended to protect you as well as
the device. Please take time to read through the following points:
• If you are not sure how to assemble, connect and install the device or if you have doubts
about its mode of operation, contact a skilled technician.
• For safety and licensing (CE) reasons any unauthorised alterations to and/or modification
of the product are not permitted.
• When its casing is properly closed, this product is suitable for use outdoors.
• This product is not a toy and should be kept out of the reach of children.
• Do not leave packaging material lying around. This may become a dangerous plaything in
the hands of children.
• Handle the product with care; knocks, blows or even a fall from a low height can damage
it.

7
5. System features
The 2-channel wireless rain sensor ‘FS20 SR’ is a component of the FS20 wireless control
system. It can control up to 2 radio receivers in this system with separately adjustable criteria.
The high range of up to 100 m (free-field) allows the device to be used to transmit over long
distances.
The system uses the 868 MHz band.
a) Functions
The rain sensor ‘FS20 SR’ has the following functions:
• Registers start of rain and transmits relevant switching commands as long as the rain lasts.
• Additional relay switching output (low-voltage switching relay with 1 x normally closed
contact & 1 x normally open contact, max. 5A at max. 30V~ or 42V=)
• Integrated sensor heating for fast drying of the sensor surface and suppression of false
positives due to, for instance, fog or other kinds of condensation.
• Wall or floor installation using universal installation bracket
• Integration in the code and addressing system of the FS20 wireless control system
facilitates a clear boundary from adjacently running systems as well as, for instance, the
control of several specific receivers
• Two switching channels with separately adjustable criteria
- Each channel may be activated/deactivated separately
- On-time adjustable between 0.25 seconds and 4.25 hours
- Selectable receiver switching pattern (transmit command)
- Transmission intervals of subsequent signals of the rain sensor
adjustable
- Receiver timer programming (1 second to 4.5 hours)
including slow-on/slow-off function for dimming
- Manual switching of the receiver using the control buttons on the ‘FS20 SR’
(for testing, for instance)

8
b) Factory setting
The rain sensor ‘FS20 SR’ is immediately ready for use from the factory on channel 1 with the
following settings:
•On-time of the receiver after rain starts:
1 minute, after which the load is switched off (transmit command)
• If more rain is registered during this minute, a new power-on command is transmitted every
24 seconds, thereby restarting the 1-minute on-time (interval time/transmission inter-
val)
• Channel 2 is inactive (OFF)
The terms printed here in bold are the adjustment criteria for each channel,
whose programming is described separately in the following user manual.

9
FS20 SR
6. Installation
a) General information
• The device must be installed at a location where precipitation can fall directly onto the
sensor surface (free path to the sky), for instance on a wall with no roof overhang or on a
freestanding support.
• The rain sensor must be installed in such a way that it does not collect dirt (for instance by
being too close to the ground). In order to be able to clean its surface easily, the sensor
should be installed somewhere where it is accessible. At the same time, the rain sensor/
cable must be out of the reach of children and animals.
• Make sure that the rain sensor is not installed directly on or near large metal objects as this
will reduce its wireless range.
b) Orientation of the rain sensor
The rain sensor is supplied with an installation bracket that allows for installation on horizontal
as well as vertical surfaces.
The inscription ‘FS20 SR’ must always be on the underside and the cable
bushing must always point to the right. See figure 1.
top
Sensor surface Sensor surface
Figure 1

10
c) Opening the casing
Use a suitable screwdriver to loosen the four screws in the corners of the top side of the rain
sensor.
Then carefully remove the cover of the casing.
The cables between the sensor and the circuit board are permanently wired.
d) Connections and controls
Figure 2
1 Holes for fastening onto the installation bracket.
2 Transmitter module
3 Keypad
4 LED
5 Plug jumpers
6 Relay contacts
7 Connection for operating voltage
TA1 TA2
TA3 TA4
JP2 JP1
ON
OFF
1
2
3
12-15V ~/=
KL2
KL1
1
2
3
4
5
67

11
e) Power supply
The rain sensor ‘FS20 SR’ requires a DC or AC voltage of 12-15V. The power consumption
is approx. 200mA.
Ideally, use a transformer for the power supply that is suitable for outdoor use.
A conventional bell transformer or a power supply unit can even be used,
however, these may only be connected and operated in dry indoor areas.
A waterproof cable with a maximum diameter of 5mm (for instance, two-core telephone cable)
must be laid between the transformer/power supply and the rain sensor. Fix the cable with, for
instance, cable clips or use suitable installation conduit.
If a power supply unit is used, the low-voltage plug must be removed and the
lead should be connected to the rain sensor.
Lay the cable in such way that it is impossible for water to run back to the power
supply or other components!
There is danger of a fatal electric shock!
Loosen the locking nut of the cable bushing and feed the cable through the locking nut/cable
bushing.
Strip about 5mm of insulation from the individual wires. Connect both of the cables for the
power supply (12-15V~ or 12-15V=) to the two screw terminals of ‘KL2’. Here, the polarity is
irrelevant.
Make sure that the cables are not too long and are not installed near the
transmitter module. This could reduce the wireless range.

12
f) Connecting the relay
Warning! Caution!
The voltages that are switched by the relay may not exceed 30V~ (AC) or 42V=
(DC). The product is not suitable for switching line voltage (230V~/50Hz)!
Never switch higher voltages! Not only do you risk destroying the rain
sensor, there is also the danger of a fatal electric shock!
The maximum load capacity of the relay is 5A.
Strip about 5mm of insulation from the cable and tightly screw it into the three ‘KL1’ screw
terminals. The assignment of the relay contact can be found in figure 2 on page 10; it can also
be found next to the screw terminals on the circuit board.
Make sure that the cables are not too long and are not installed near the
transmitter module. This could reduce the wireless range.

13
g) Installation
If the rain sensor is to be installed at a location that will be difficult to
reach for programming, then make sure that you program it before
installation.
The programmed settings and functions will be preserved even if the
device is later disconnected from its power supply.
• Place the installation bracket in the desired installation location and, if necessary, mark the
position for the bore holes.
Depending on the installation location, suitable holes should be drilled and appropriate
dowels should be inserted before the installation bracket is screwed in.
Make sure not to damage any power supply lines, gas or water pipes –
this may cause life-threatening danger!
• Use four screws to mount the bracket at the installation location (see figure 1).
• Afterwards, the rain sensor can be mounted to the installation bracket.
The inscription ‘FS20 SR’ must always be on the underside and the cable
bushing must always point to the right.
Screw both stainless steel screws into the mounting holes of the rain sensor’s casing (see
figure 1 on page 9). Continue to screw them through the openings of the installation bracket.
Place a spring washer onto each screw and then screw on the nuts. Use a pair of pliers or
the right size (small) wrench to screw the nuts tight.
• Check that the seal sit correctly in the cover’s grooves.
• Place the cover with the sensor plate onto the rain sensor’s casing and screw it down using
the four cover screws.
• Connect the power supply to the line voltage.

14
7. Initial operation
a) Quick installation with factory settings
The rain sensor is immediately ready for operation with the factory settings described in section
5. Its transmission signals are encrypted using a house code that is randomly assigned when
the power supply is connected and the address group 11 (control of several receivers with one
transmitter is possible).
For the initial operation of the transmission path to the receiver, the house code and the
addresses must now be transmitted to the receiver.
• Set the respective receiver, according to the instructions in its user manual, to the address
programming mode.
• For channel 1 press button ‘2’ (for channel 2: button ‘4’) on the ‘FS20 SR’.
• The LED on the receiver goes out; the switching channel has been programmed.
• Test the switching function by briefly pressing the buttons on the rain sensor ‘FS20 SR’.
Press button ‘2’: Switch on channel 1
Press button ‘1’: Switch off channel 1
Press button ‘4’: Switch on channel 2
Press button ‘3’: Switch off channel 2
The rain sensor ‘FS20 SR’ is now ready for operation with the factory settings.
If you do not want to make any further individual settings, you can now install
the rain sensor. See section 6. g).
b) Function test
• Add some fluid to the sensor surface. This causes the rain sensor to transmit a power-on
command; the relay is triggered at the same time.
• Test the function of the sensor heating – the sensor surface should feel slightly warm.
• After the fluid has evaporated, the relay drops off immediately. The consumer connected
to the FS20 receiver is switched off after 1 minute.

15
8. The FS20 address system
The radio transmission is secured by an extensive coding system to allow multiple FS20
components (which also includes the ‘FS20 SR’ rain sensor) to be operated in the same area.
The code consists of a ‘house code’ and an ‘address’. The house code serves to differentiate
between multiple FS20 systems operating simultaneously. This means that your neighbour
can use the same wireless control system and the two systems will not interfere with each other
(provided that the house code has been programmed differently).
The house code consists of 8 base-four digits (1, 2, 3, 4) meaning that in total 48(= 65536)
different house codes are possible. This makes it extremely unlikely that your neighbour will
use the same house code (assuming that you do not use ‘simple’ house codes).
The second part of the code is the so-called ‘address’. Every address is a four-digit number
made up of the following 16 numbers: 11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43,
44
Example: Address 11 22
This means that there are a total of 256 different addresses (16x16 = 256). The addresses are
divided into four address types (available number is in brackets):
• Single addresses (225)
• Function group addresses (15)
• Local master addresses (15)
• Global master address (1)
Each address consists of two parts. Part 1 is the ‘address group’, part 2 is the ‘subaddress’.
Example: Address 11 22 = address group ‘11’, subaddress ‘22’
The number ‘44’ has a special meaning. Please see the table on the next page.

16
Address group Subaddress
Single address 44 44
Function group address 44 44
Local master address 44 44
Global master address 44 44
44 = This value must be set to ‘44’.
44 = This value must not be set to ‘44’.
Possible values are:
11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43
Every receiver can be assigned one address from each of the four address types (single
address, function group address, local master address, global master address).
This means that each receiver can respond to up to four different addresses, but only ever to
one address per address type.
If you need a receiver to respond to more than one transmitter, you can program
the transmitters to the same address or, if different transmitter address types
have been set, you can program the receiver consecutively to these different
addresses.
The individual address types have the following function:
• Single addresses
Each receiver should be set to a single address so that it can be controlled separately.
• Function group addresses
Several receivers are defined as a functional unit by being assigned to a function group
address. If, for example, all the lamps in a house are assigned to a function group, then all
the lamps in the entire house can be switched on or off by pressing one button.
• Local master addresses
Several receivers are spatially defined as one unit and controlled via the local master
address. If, for example, all the receivers in a room are each allocated to a local master
address, then all you need to do is press one button when leaving the room to switch off
all the consumer loads in the room.

17
• Global master address
Several receivers are assigned to the global master address and are jointly controlled via
this address. All the consumer loads can easily be switched off simply by pressing one
single button when leaving a house, for example.
The figure below illustrates a possible configuration of different FS20 components in a house:
1111
1144
4411
4444
1122
1144
4444
1131
1144
4444
1211
1212
4411
4444 1311
4411
4444
1411
4411
4444
1412
4444
A
BC
D
Global
master address
4444
Local
master address,
e.g. 1144
House code, e.g.
1234 1234
Function group 44xx,
e.g. 4411 ceiling lamps
Figure 3: Example of an address assignment

18
A different address group has been assigned to each room:
• Room A: 11
• Room B: 12
An awning is also allocated to room B.
• Room C: 13
• Room D: 14
When you require a large, extended system, it is advisable to select addresses systematically
so that you have an overview of the addresses that have already been assigned and so that
you can jointly control the programmed receivers simply and logically in groups.
If you plan to use a number of different FS20 components, draw a diagram of
the rooms and make a note of the location of the devices to be controlled and
their addresses in the diagram.
In the example, each room has been assigned its own address group (room A: 11, room B: 12,
room C: 13, room D: 14). The awning is also allocated to room Bwith address group 12.
15 address groups are possible:
11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43
This value must not be set to ‘44’.
In order to be able to separately control each receiver, you need to program each one to a
single address. In addition to the address group that is already selected (room A: 11, room B:
12, room C: 13, room D: 14), a subaddress is also needed.
The following 15 subaddresses are possible for each address group:
11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43
This value must not be set to ‘44’.
In the example the awning is programmed to the single address 1211, which is comprised of
the address group 12 and the subaddress 11.
All the receivers in room A have also been programmed to a local master address (1144 in the
example).
For the local master address 44 must always be used as the subaddress. The
address group can be set to 11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41,
42, or 43.
Example: 1144, address group 11, subaddress 44
All the lamps in the house can be controlled via the global master address 4444.

19
The awning was deliberately not programmed to this address and can therefore only be
addressed via its single address (1211). It must be operated separately in this example.
The ceiling lamps in all the rooms are also combined in a function group (4411 in the example,
address group 44, subaddress 11) and can therefore be jointly controlled.
For a function group 44 must always be used as the address group. The
subaddress can be set to 11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42,
or 43.
Example: 4411, address group 44, subaddress 11

20
9. Programming/operation
a) Integrating the ‘FS20 SR’ into the address system
Please note:
In the delivery state the components of the FS20 wireless control system do not
respond to remote control commands. They must first be addressed by the
transmitter according to the instructions provided in the respective switching
device’s user manual.
Only then is it possible to control the device with the transmitter.
All the settings including the addresses, coding and timer programming can be programmed
using the four buttons and the two plug jumpers on the circuit board inside the ‘FS20 SR’ rain
sensor.
Once the rain sensor has been programmed it functions fully independently
and does not require any further operation whatsoever.
The ‘FS20 SR’ rain sensor is part of the FS20 wireless control system. For that reason it is of
course possible to integrate it into the that code and addressing system, in case you wish to
operate various devices of the FS20 wireless control system parallel.
During the initial operation of the ‘FS20 SR’ rain sensor, a random house code and the
standard address assignment for the channels are automatically configured.
It is only necessary to change these automatically generated settings, if you
wish to operate more than one device from the FS20 wireless control system.
You can change or adjust the house code and addressing whenever you want.
The house code, an address group and a subaddress are used for coding the transmitters and
their individual buttons. You can also use special address group assignments to program the
‘FS20 SR’ as a local or global master.
For more information on this, see section 8.
Only the digits 1 to 4 are used for entering the eight-digit house code, the two-digit address
group and the two-digit subaddress. These are assigned to the four buttons (see figure 2).