SR05-D1A3-PV manual v1801 32/83
5.6 Electrical connection of SR05-D1A3-PV: wiring diagram
The instrument must be powered by an external power supply, providing an operating
voltage in the range from 5 to 30 VDC. SR05-D1A3-PV offers irradiance in W/m
2
as a
digital output (Modbus over RS-485) and as an analogue 0 to 1 V output.
This user manual covers use of SR05-D1A3-PV. Specifications of this version
differ from those of the other digital and analogue sensors in the SR05 series
range. For use of SR05-D1A3 or SR05-D2A2, consult the separate SR05-D1A3 &
SR05-D2A2 user manual. For use of SR05-A1, offering analogue millivolt output,
consult the separate SR05-A1 user manual.
Table 5.6.1 Wiring diagram of SR05-D1A3-PV
PIN WIRE
SR05-D1A3-PV
1 Brown VDC [+] VDC [+]
4 Black VDC [−] VDC [−]
3
Blue not connected 0 to 1 V output
2 White RS-485 B / B’ [+] not connected
5
Grey RS-485 A / A’ [−] not connected
Yellow shield shield
Note: at the connector-end of the cable, the shield is connected to the connector housing
5.7 Grounding and use of the shield
Grounding and shield use are the responsibility of the user. The cable shield (called shield
in the wiring diagram) is connected to the aluminium instrument body via the connector.
In most situations, the instrument will be bolted on a mounting platform that is locally
grounded. In these cases the shield at the cable end should not be connected at all.
When a ground connection is not obtained through the instrument body, for instance in
laboratory experiments, the shield should be connected to the local earth ground at the
cable end. This is typically the ground or low voltage of the power supply or the common
of the network. In exceptional cases, for instance when both the instrument and a
datalogger are connected to a small size mast, the local ground at the mounting platform
is the same as the network ground. In such cases ground connection may be made both
to the instrument body and to the shield at the cable end.
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