Lambrecht rain[e]H3, User Manual

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User Manual
Precipitation Sensor rain[e]H3 with Ethernet
Id-No. 00.15184.540 020
rain[e]H3 Precipitation Sensor Manual
7.3 Power and Signal Connection
To connect the rain[e]H3 to a data acquisition system a M12 connecting cable is required. Connect the cable
according to the connecting diagram. For the power supply of the heating, a power cable should be connected to
the power supply unit according to the connecting diagram.
Sensor connection signal and supply
M12 sleeve A-coded
Id.-No. Cable 32.15184.060000 (10,00 m)
Heating connection supply
M12 sleeve T-coded (heating)
Id.-No. Cable 32.15184.061000 (1,00 m)
Ethernet connection
M12 sleeve D-coded (Ethernet)
Id.-No. Cable 32.05304.000200 (2,00 m)
It is important to plug in the power plug of the heating first – before the terminal plug of the funnel
heating and the sensor connector. Otherwise the automatic heating control will shut down the
heating.
The maximum distance between the rain[e]H3 and the data acquisition system depends on the interfaces being
used. The values for RS485 and Ethernet are obtained from the respective definitions of these standards.
• RS485 1000 m
• Ethernet 100 MBit 100 m (CAT-S)
If a power cable longer than 3 m at 0.75 mm
2
is used for heating supply, this
formula can be used to calculate the actual power P
a
with the nominal voltage
U
N
= 24 V DC, the nominal power P
N
= 200 W, the specific electrical resistance
ρ = 0.017 Ωmm²/m for copper , the length of the cable l and the cross section of the
cable A .
The heating requires an actual power P
a
of higher than 180 W to operate.
The USB cable for the service interface should not be longer than 3 m.
7.4 System Start
The system starts automatically after connecting all plugs. After ~15 s the system starts collecting data and sends
them to the attached data logger according to the device configuration.
The table below lists the LEDs and their functions.
Colour LED Function
Green Blinks for about 5 seconds at start and goes off when no connection can be made.
Red LED is ON, when connection is active
Green Blinks non-cyclically during communication.
2
2
4
2






+
=
A
l
P
U
P
U
P
N
N
N
N
a
ρ ρ
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