esera automation 20002 User manual

Art. No. 20002
All rights reserved. Reproduction as well as electronic duplication of this user guide, complete or in part, requires the written consent of
ESERA GmbH. Errors and technical modification subject to change. ESERA GmbH, ESERA-Automation 2020
www.esera.de 20002 V2.0 R1.0 Manual Page 1 of 4
User guide
Rain sensor 12V
Product features
Reliable, electrolytic measuring principle
Detects precipitation as rain and snow
Operating voltage 12 V DC/AC
Large, heated sensor surface for quicker
drying and winter operation
Potential-free switching output (relay) 30V/4A
Sensitivity and switching behavior adjustable
Universal wall/pole mount as accessory
1 Introduction
Before you start installing the rain sensor and putting the device into operation, read these Installation and
Operating Instructions carefully until the end, especially the section on Safety Instructions
2 Product Description
The large sensor surface reacts to rain or snow. The switching polarity and the sensitivity are adjustable. The
switchable heating prevents icing or condensation and accelerates drying. In the most sensitive setting, the
device is also suitable for detecting fog. The mast or wall bracket, which is available as an accessory, makes
installation easy. Typical applications are in garden centers, in agriculture, in building control systems, but also in
homes and gardens.
The rain detector is equipped with a relay contact for switching low voltages up to 30V DC/AC in order to be able
to act on switching devices such as an awning control unit. The sensitivity is adjustable over a wide range. The
device is equipped with a heater for faster drying and snow detection.

All rights reserved. Reproduction as well as electronic duplication of this user guide, complete or in part, requires the written consent of
ESERA GmbH. Errors and technical modification subject to change. ESERA GmbH, ESERA-Automation 2020
www.esera.de 20002 V2.0 R1.0 Manual Page 2 of 4
3 Settings
Output signal transmitter (optional): A passive piezo signal
transmitter can be connected to the connector strip (pin BUZ and
GND). The status of the signal (acoustic signal at dry or wet) can be
set with jumper S1-S2 or S2-S3. In the default position S2-S3 the
signal transmitter is inactive when it rains.
Switching behavior: The switching behavior of the relay (energised
or de-energised in rain) can be set with the jumper of T1-T2 or T2-
T3. In the factory setting the jumper T1-T2 is plugged in and the relay
picks up when the sensor surface becomes wet.
Heating: The sensor surface is heated if the bridge of HZ1-HZ2 is
plugged in. To ensure faster drying and for use below freezing, the
heater should be switched on. The heater can be switched off to
detect fog.
Sensitivity setting: The sensitivity of the humidity signal can be influenced at the potentiometer. A higher sensitivity
is achieved by turning the potentiometer axis counterclockwise (right = high sensitivity, left = low sensitivity). The
middle position is most suitable for normal rain signaling. Note that there is no function at the end stops!
Loosen the cover screws of the sensor, unlock the plug connector of the sensor cable and put the cover aside first.
This will prevent damage to the sensor connection cable during the following steps. Mount the cable gland to the
housing.
4 Technical data
Temperature measurement
Operating voltage
12V DC/AC +10%
Current consumption
60 mA
Heating 80-300mA (PTC)
Measurement method
electrolytic AC voltage
measurement
Load on contacts
max. 30V DC / 4 A
Connection terminals
0,5mm - 1,5mm2
Clamp with wire protection
Dimensions
80 mm x 82 mm x 58 mm
Distance between
mounting holes
Horizontal: 50 mm Vertical: 70
mm, Diameter: 4,3 mm
Cable inlet
M16
Housing
ABS, Protection system IP54
EMC-compatibility
Interference emission
Interference immunity
89/336/EWG
EN 61000-6-3
EN 61000-6-1
Package contents
Rain detector in housing, PG
cable gland / blind cover, cover
screws and documentation
optional extras
Wall/pole bracket
Best. No. REGME-WAHA
The technical data are subject to change without notice!
Pin assignment
Terminal block
REL NC
Switching contact NC contact
REL NO
Switching contact N/O contact
REL CO
Switching contact fixed pole
AC/DC
operating voltage AC or +12V DC +10%
AC/GND
Operating voltage AC or 0V
plug bridges
Configuration
1
S3
Switching behaviour of signal transmitter
(dry)
2
S2
Center contact to S3, S1
3
S1
Switching behaviour of signal transmitter
(wet)
4
GND
Ground Signal transmitter
5
BUZ
Output signal transmitter
6
T3
Switching behaviour relay (dry)
7
T2
Center contact to T3, T1
8
T1
Switching behaviour relay (wet)
9
HZ1
Heating
10
HZ2
Heating
Factory setting: S3-S2 T1-T2 HZ1-HZ2

Art. No. 20002
All rights reserved. Reproduction as well as electronic duplication of this user guide, complete or in part, requires the written consent of
ESERA GmbH. Errors and technical modification subject to change. ESERA GmbH, ESERA-Automation 2020
www.esera.de 20002 V2.0 R1.0 Manual Page 3 of 4
5 Connection
After unscrewing the sensor cover, the control cable is inserted into the cable gland M16.
The operating voltage is applied to the terminals VCC and GND. The potential-free changeover contact is connected
to the NC, COM and NO terminals.
6 Display
In the device there is a green LED for the operating indication and a red LED for the switching position indication
(relay contacts switched through).
7 Maintenance
The rain detector is largely maintenance-free. The sensor surface may have to be cleaned occasionally (e.g. once
a year, depending on the installation location) with a damp cloth. In the case of a continuous signal, even if it is not
raining, heavy soiling is to be assumed.
8 Assembly
The rain detector can be mounted on a wall/pole bracket. If this is not used, a mounting angle of approx. 30° to
the horizontal must be observed. The tips of the sensor surface must point downwards. The rain detector should
be installed in a place that is freely accessible to rain. Dripping water can delay the switching back considerably
or lead to a permanent switching on/off.
9 Disposal instructions
Do not dispose of the device in domestic waste! Electronic devices are to be disposed of
according to the Directive on waste electrical and electronic equipment (WEEE) on local
authorities and collection points for waste electronic equipment!
10 Safety instructions
When handling products that come into contact with electrical voltage, the applicable VDE regulations
must be observed, in particular VDE 0100, VDE 0550/0551, VDE 0700,
VDE 0711 and VDE 0860.
The device is only designed for low voltage and must not be operated with mains voltage!
The relay contact is only designed for small signals and must not come into contact with mains voltage!
The degree of protection is only given with an intact, complete housing, the cover screws and the PG screw connection must
be tightened firmly, the cover seal must be continuously present in the sensor cover!
The suitability for a certain application must be checked by the user!
All final or wiring work must be carried out with the power turned off.
Before opening the device, always unplug or make sure that the unit is disconnected from the mains.
Components, modules or devices may only be put into service if they are mounted in a contact proof housing.
During installation they must not have power applied.
Tools may only be used on devices, components or assemblies when it is certain that the devices are disconnected
from the power supply and electrical charges stored in the components inside the device have been discharged.
Live cables or wires to which the device or an assembly is connected, must always be tested for insulation faults or
breaks.
If an error is detected in the supply line, the device must be immediately taken out of operation until the faulty cable
has been replaced.
When using components or modules it is absolutely necessary to comply with the requirements set out in the
accompanying description specifications for electrical quantities.
If the available description is not clear to the non-commercial end-user what the applicable electrical characteristics
for a part or assembly are, how to connect an external circuit, which external components or additional devices can
be connected or which values these external components may have, a qualified electrician must be consulted.
It must be examined generally before the commissioning of a device, whether this device or module is basically
suitable for the application in which it is to be used.
In case of doubt, consultation with experts or the manufacturer of the components used is absolutely necessary.
For operational and connection errors outside of our control, we assume no liability of any kind for any resulting
damage.
Kits should be returned without their housing when not functional with an exact error description and the
accompanying instructions. Without an error description it is not possible to repair. For time-consuming assembly or
disassembly of cases charges will be invoiced.

All rights reserved. Reproduction as well as electronic duplication of this user guide, complete or in part, requires the written consent of
ESERA GmbH. Errors and technical modification subject to change. ESERA GmbH, ESERA-Automation 2020
www.esera.de 20002 V2.0 R1.0 Manual Page 4 of 4
During installation and handling of components which later have mains potential on their parts, the relevant VDE
regulations must be observed.
Devices that are to be operated at a voltage greater than 35 VDC / 12mA, may only be connected by a qualified
electrician and put into operation.
Commissioning may only be realized if the circuit is built into a contact proof housing.
If measurements with an open housing are unavoidable, for safety reasons an isolating transformer must be
installed upstream or a suitable power supply can be used.
After installing the required tests according to DGUV / regulation 3 (German statutory accident insurance,
https://en.wikipedia.org/wiki/German_Statutory_Accident_Insurance) must be carried out.
11 Warranty
ESERA GmbH guarantees that the goods sold at the time of transfer of risk to be free from material and workmanship
defects and have the contractually assured characteristics. The statutory warranty period of two years begins from date of
invoice. The warranty does not extend to the normal operational wear and normal wear and tear. Customer claims for
damages, for example, for non-performance, fault in contracting, breach of secondary contractual obligations,
consequential damages, damages resulting from unauthorized usage and other legal grounds are excluded. Excepting to
this, ESERA GmbH accepts liability for the absence of a guaranteed quality resulting from intent or gross negligence.
Claims made under the Product Liability Act are not affected.
If defects occur for which the ESERA GmbH is responsible, and in the case of replacement goods, the replacement is
faulty, the buyer has the right to have the original purchase price refunded or a reduction of the purchase price.
ESERA GmbH accepts liability neither for the constant and uninterrupted availability of the ESERA GmbH or for technical
or electronic errors in the online offer.
We are constantly developing our products further and reserve the right to make changes and improvements to any of the
products described in this documentation without prior notice. Should you require documents or information on older
versions, please contact us by e-mail at [email protected].
12 Trademarks
All mentioned designations, logos, names and trademarks (including those which are not explicitly marked) are
trademarks, registered trademarks or other copyright or trademarks or titles or legally protected designations of their
respective owners and are hereby expressly recognized as such by us. The mention of these designations, logos, names
and trademarks is made for identification purposes only and does not represent a claim of any kind on the part of ESERA
GmbH on these designations, logos, names and trademarks. Moreover, from their appearance on ESERA GmbH
webpages it cannot be concluded that designations, logos, names and trademarks are free of commercial property rights.
ESERA and Auto-E-Connect are registered trademarks of ESERA GmbH.
13 Contact
ESERA GmbH
Adelindastrasse 20
87600 Kaufbeuren
Germany
Tel.: [phone]
Fax: [phone]
www.esera.de
[email protected]
WEE-Number: DE30249510