Sdi-12 Sensor Connections; Self Powered Sensor - Adcon A725 addSDI User Manual

SDI-12 Sensor Connections

Sensor powered by RTU

Self powered Sensor

To connect a single SDI-12 sensor, that does not have it's own
power supply, follow the wiring scheme as shown in Figure 11.
GND
1
Detection
Jumper
2
SDI Sense 3
SDI POWER
Figure 11. Single Sensor Connection, sensor is powered by the RTU
Note: In this configuration, the RTU powers the SDI-12 sensor. The
sensor must be capable of working with a supply voltage as
low as 5.6V.
WARNING Check the minimum supply voltage of your sensor
BEFORE installing it! This information should be available from
your sensor supplier.
Sensors with an integrated power supply must be connected fol-
lowing the wiring scheme in Figure 12.
SDI-12 Sensor Connections
SDI GND
5
4
SDI DATA
gray
yellow
green
17
CHAPTER 3
SDI GND
SDI DATA
POWER
SDI−12 SENSOR