700-SDI-RADAR-300W-Man Rev 2 30 May 2022
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Part# 21370
Appendix A
SDI-12 ADAPTER
The SDI-12 Adapter is an interface device which provides SDI-12 connectivity to devices that have no
SDI-12 native support. The adapter is versatile and designed to support Modbus on the sensor side.
Additionally, it is equipped with DC SSR for controlling power supply for sensors that do not support
low power mode. Details of SDI-12 Commands can be found in Chapter 4, section 4.2.5.
A.1
ELECTRICAL CHARACTERISTICS
Parameter
MIN
TYP
MAX
Unit
Power supply voltage
9.0
12.0
27.0
V
Power
Operational mode
Sleep mode
950
85
mW
mW
Power output maximal current
2.0
A
Analog output maximal voltage
30
VDC
Analog input maximal current
22
mA
Operational temperature range
-40
-40
+85
+185
°C
°F
Ingress Protection Rating
IP54
Mechanical
75x45x50
3 x 1.8 x 2
mm
in
A.2
CONNECTING TO THE SDI-RADAR-300W
Wire the radar and data logger to the SDI-12 Adapter in accordance with Figure A-1. See Table A-1
for relevant pin descriptions.
Note 1: RS232 connections only used when configuring the Geolux SDI Converter (contact FTS for details).
Figure A-1: SDI-12 Adapter wiring diagram
Radar
Datalogger
Note 1
