SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

SonTek/YSI
A2.2. Connecting the Argonaut to a Data-Logger
To facilitate operation of an Argonaut with external SDI-12 data storing systems, the Argonaut
power/communication cable has been modified to include a separate termination to be used with
SDI-12 capable data-loggers (Figure A2.1).
The cable has an 8-pin underwater connector on one end and three separate cable terminations on
the other end. The description of these termination cables follows.
Note: Although the cable below represents the most common assembly, the cable for your system
may vary. See §A2.2.3 and Figures A2.4 through A2.7 for information on the most common
cable assemblies.
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• SDI-12 pigtail:
Red ---------------------- Power to Argonaut (+6 to +16 VDC)
White ---------------------- Data (SDI-12)
Black ---------------------- Ground
WARNING: The power line does not have over-voltage protection. Voltages
above +16V on the pigtail will damage Argonaut electronics.
• Coaxial power cable (for an optional AC/DC adaptor or external power above 16 VDC):
Center pin ----------------- Power to Argonaut (+10 to +26 VDC)
Jacket ----------------- Ground
WARNING: The power line does not have over-voltage protection. Voltages
above +26V on the coaxial power cable will damage Argonaut electronics.
• RS-232 cable (DB9):
Pin 2 ------------------------ Data out
Pin 3 ------------------------ Data in
Pin 5 ------------------------ Ground
Note: The remaining pins are not connected.
Figure A2.1. Argonaut power/communications cable
modified for internal SDI-12 operation.
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)