LPPYRA12
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V2.5
4.5
LPPYRA12S12
CONNECTIONS
The pyranometer LPPYRA12S12 has
SDI-12
output and requires
7…30 Vdc
external
power supply. It is to be connected to a power supply and to an acquisition system
(data logger) as shown in fig. 4.5.
Connector
Function
Cable color
1
Power supply negative (GND)
SDI-12 output negative
Blue
2
Power supply positive (+Vdc)
Red
3
Not connected
4
Not connected
5
SDI-12 output positive
White
6
Housing / Cable shield (SH)
Black
7
Not connected
8
Not connected
DATA
GND
1
2
3
4
5
6
7
8
GND
+Vdc
SDI-12
SDI-12 BUS
+
-
+Vdc
GND
SH
Fig. 4.5: LPPYRA12S12 connections
More SDI-12 sensors can be connected in parallel. The distance between a sensor and
the acquisition system (data logger) should not exceed 60 m.
Due to its low power consumption (< 200 µA), LPPYRA12S12 is particularly suitable
for battery/solar panel-powered data acquisition systems.
Before connecting the instrument to an SDI-12 network containing other sensors, set
the address by using the proper SDI-12 command (see chapter 7).
Data logger
input
Pyranometer M12
male connector
CPM12-8D… cable
Power supply
Other SDI-12
sensor
Other SDI-12
sensor
Connect to ground only if it is not possible to
ground locally the housing of the pyranometer
