IRS31Pro-UMB
Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH
18
7.3.1 Cable Connection for SDI12 Operation
There are two options to connect the sensor to a SDI12 logger:
Connecting the road sensor with power supply by the SDI12 bus
1 ............. white ................ SDI12 GND
2 ............. brown............... SDI12 +12V
3 ............. green ............... not connected
4 ............. yellow .............. SDI12 Signal
Attention:
In this case SDI12 GND may
not
be connected to earth!
Connecting the sensor with isolated power supply:
1 ............. white ................ negative power supply
2 ............. brown............... positive power supply
3 ............. green ............... SDI12-GND
4 ............. yellow .............. SDI12 Signal
Attention:
The power supply lines may
not
be connected to earth!
