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SDI-12
The SDI-12 port operates as a “Master” and is V1.3 compliant and compatible with
standard SDI-12 sensors. SDI-12 sensors have a minimum of three wires, which
are +12V, Data, and Ground. If connecting several SDI-12 sensors to the system an
external bussed terminal strip may be helpful.
The +12Vout excitation grouped with the SDI-12 connections is active any time
power is applied to the unit. It cannot be turned off. There are two internally
connected ground connections for convenience, as some sensors have both a
ground and a shield wire. In some cases, the shield wire from the sensor should
be connected to the case shield connection point provided (also labeled Gnd).
Wi-Fi Button
The Wi-Fi button can be pressed to activate the Wi-Fi signal (this is a capacitive
button and may not work if using gloves). The USB Wi-Fi adaptor must be
plugged into one of the USB Host ports for the Wi-Fi button to work properly. The
Active LED will turn on for a couple of seconds when the button is successfully
pressed. The Wi-Fi adaptor will power off automatically after three minutes of
inactivity.
Power Connection
The main power input uses a separate 2-position connector, so the power can be
disconnected individually.
USB
Two USB-A connectors and one mini-B connector are provided, allowing direct
connection to an external device such as a Wi-Fi adaptor, laptop, tablet, or
USB flash drive. USB flash drives can be used to download data, save or load
configuration files, and load firmware updates.
Ground Lug
Proper shield or earth grounding should be used to protect the equipment from
exposure to Electrostatic Discharge and other induced interference.
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