LPPYRA10
- 10 -
V2.6
4
ELECTRICAL CONNECTIONS
LPPYRA10
,
LPPYRA10AC[4]
and
LPPYRA10AV[4]
have a 4-pole connector and use
the
CPM12AA4...
optional
cables, with 4-pole connector on one side and open wires
on the other side.
LPPYRA10S
and
LPPYRA10S12
have a 8-pole connector and use the
CPM12-8D...
optional
cables, with 8-pole connector on one side and open wires on the other side.
LPPYRA10ACS[4]
has a 8-pole connector and uses the
CPM12-8DA...
optional
ca-
bles, with 8-pole connector on one side and open wires on the other side.
The metallic housing of the pyranometer should preferably be
grounded ( ) locally. In this case, do not connect the wire of the
cable corresponding to the housing to prevent ground loops.
Only if it is not possible to ground locally the metallic case of the
pyranometer, connect the wire of the cable corresponding to the
housing to ground ( ).
Note: in LPPYRA10AV[4] the housing is not
connected to the connector.
Inside the housing there is a surge protector connected between the
housing itself and the electronic circuit (powered models) or the ca-
ble shield (passive model). Grounding the housing allows the correct
protection function (in particular against lightning) of the surge pro-
tector.
4.1
LPPYRA10
CONNECTIONS
The pyranometer LPPYRA10 is passive and does not require power supply. It is to be
connected either to a millivoltmeter or to a data acquisition system. Typically, the py-
ranometer output signal does not exceed 20 mV. In order to better exploit the pyra-
nometer features, the readout instrument should have 1
µ
V resolution.
Connector
Function
Color
1
+Vout
Red
2
-Vout
Blue
3
Housing (C)
White
4
Cable shield (SH)
Black
1
2
3
4
+Vout
-Vout
SH
C
Fig. 4.1: LPPYRA10 connections
CPM12AA4… cable
Pyranometer M12
male connector
Datalogger or
converter/amplifier
with
V
or
mA
output
Connect to ground only if it is not possible to
ground locally the housing of the pyranometer
To circuit
Housing
Surge
protector
