Jetec DRD-12V User manual

Rain Detector DRD-12V
DescriptionDescription
Technical Data
Measurement method Electrolytic AC measurements
Input current (12 V Model ) 60 mA, Heater 80 - 300 mA (PTC)
50 mA, Heater 40 - 180 mA (PTC)
CE-Conformance 2014/30/EU
EMV-noise emission EN 61000-6-3:2011
EMV-noise withstanding EN 61000-6-1:2007
Cable gland M16 x 1,5
Operating voltage chooseable 12 V AC/DC ± 10
24 V AC/DC ± 10%
%
Output output (relay) 30 V / 4 A,
NO / NC selectable
Housing ABS, ingress protection IP54
Dimensions (w x h x d)
*依設定需要暖機90~250秒
80 x 82 x 58 mm
Art.-No.
DRD-12V
DRD-24V
Article
Rain Detector 12V
Rain Detector 24V
Combined Wall/mast mounting
bracket(Options)
DRD-WAHA
Features
• Safe operation, electrolytic measurement principle
• Deposition can be detected as rain or snow
• Operating voltage 12 or 24V DC/AC
• Large, heated sensor area for fast drying and operation in winter
season
• Potential free contact output (Relay) 30 V/4 A
• Sensitivity and switching mode adjustable
• Universal wall/mast mounting bracket as accessories
Applications
• Nurseries, Agriculture
• Control of Ventilation panels
• Automatic switch for Blinds and Rolling windows
• Building instrumentation
• Weather stations
Functional description
The large sensor area reacts to rain or snow. The switch polarity and
sensitivity are adjustable. The optionally switched heater prevents
freezing or dew formation and accelerates drying. In the maximum
sensitivity setting, the device is also suitable for recognizing fog.
Application
up to 30 V DC/AC which can be used to operate any switching device
e.g. a marking control device. Sensitivity can be adjusted within a wide
range. The device is provided with a heater for faster drying and snow
recognition.
Mounting
Installation of the rain sensor unit should be carried out by only
authorised personnel. The applicable safety regulations should be
followed ! The Rain Sensor can be installed on a wall/mast mounting
bracket. If such accessories are not used, care should be taken that
the mounting angle is approximately 30 ° from horizontal. The points
of sensor area must be on the down side. Mounting of the Rain Sensor
should be done at a place which is freely accessible for rain. Dripping
water can adversely delay switching back or can lead to a permanent
ON/OFF of the contacts.
Accessoires(Options)
wall / mast mounting bracket
including mouting hardware

OPERATION MANUAL
Rain Detector DRD-12V
Connection
After removing the sensor cover, the control cable is to be inserted in
the cable gland M16.
Supply voltage is to be connected to the terminals VCC and GND.
Terminals NC, COM, NO are the potential free changeover contacts
for switching.
Precautions:
• The device is suitable only for low voltages and should not be
operated on mains supply !
• The relay contact is only suitable for low value signals and
should not come in contact with mains supply !
• The protection type is valid only with an intact, complete casing,
cover screws and cable gland properly tightened, and the cover-
gasket should always be available on the sensor cover !
• The suitability for certain applications is to be checked by the
user
Settings
Signal generator output (optional)
At the connection terminals (Pin BUZ and GND) a passive Piezo
signal generator can be connected. The condition of signal (acustic
signal for dry or wet) can be selected with the plug links S1-S2 or
S2-S3. In the default-position S2-S3, the signal generator is inactive
for rain.
Switching mode
The switching mode of the relay (pickup or dropout with rain) can be
selected with the plug links T1-T2 or T2-T3. In the factory settings,
link T1-T2 is connected and the relay closes if the sensor surface
gets wet.
Heating
The sensor surface is heated, if the link of HZ1-HZ2 is connected. To
ensure faster drying and for operation below freezing point, the
heater should be switched on. For sensing fog, the heater can be
switched off.
Sensitivity setting
The sensitivity for detecting rain can be adjusted with the potentiometer
“SENS”. Rotating the potentiometer clockwise results a higher sensitivity
For direction rain mostly the middle position of the potentiometer is suitable
Please note that no function takes place in the end position!
Indicators
There is a green LED on the device to indicate the operation status
and a red LED to indicate the switch position (meansrelay contact
closed).
Maintenance
The Rain Sensor unit is almost maintenance free. The sensor surface
must be occasionally cleaned with a moist cloth ( e.g. once annually,
depending on the place of installation). In case of persistent condi-
tion, even if it does not rain, it triggers due to strong contamination.
Connection Layout
REL NC Opening switch contact
REL NO Closing switch contact
REL CO Common switch contact
AC/DC Operating voltage AC or 24 V DC +10%
AC/GND Operating voltage AC or 0 V
1 Switch mode signal generator (dry)
2 Common contact to S3 and S1
3 Switch mode signal generator (wet)
4 Signal generator ground
5 Signal generator output
6 Switch mode relay (dry)
7 Common contact to T3 and T1
8 Switch mode relay (wet)
9 Heating
10 Heating
11-16 not occupied
Dimensions
Attention
Please avoid extreme mechanical and inappropriate exposure.
The device/product is not suitable for potential explosive areas and
medical-technical applications.
issueC/20220908/V4