XL™ Series Hardware Options and Installation 2-13
Figure 2-14 SDI-12 Section
Figure 2-15 SDI-12 Expanded Connector System
2.2.13 SDI-12 Section
Pins 16, 17, and 18 of the terminal block provide connection points for SDI-12 senors and data
loggers. The XL™ can be used as both an SDI-12 sensor and as an SDI-12 data logger. In either
case these connections are made at the same place. The +12V power connection under the SDI-
12 section is limited to about one amp so it may be necessary to connect the SDI-12 sensor power
line directly to the battery or to main power.
If several SDI-12 sensors are to be connected to the XL™, it may be necessary to use an external
terminal strip to provide enough connection points.
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