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Single-ended voltage sensor (e.g. SM200)
The picture shows an SM200 single-ended sensor
connected and powered from Channel 1.
Function
Power to sensor
Signal
Ground
Note: Ensure a wire link is fitted between IN- and 0V.
Differential voltage sensor (e.g. ML3)
The picture shows an ML3 soil moisture sensor connected and powered from
Channel 1 and its temperature sensor connected to the resistance channel.
Function
Power to sensor
Power return
Signal +ve
Signal -ve
Temperature +
Cable screen
Temperature / Resistance channel 7 (e.g. ST1)
The picture shows a 2K thermistor temperature sensor connected
to channel 7. Connect between IN+ and IN-.
Connect any braid or screen to the
Rain gauge / Count channel 8 (e.g. RG1)
Use this channel to monitor slow events such as a rain gauge.
A rain gauge is shown connected to IN+ and IN- terminals.
This channel can be used to initiate dual-rate logging.
Refer to online Help for detailed information.
Note: the polarity of cable connection is not important when
using thermistors or rain gauges.
Relay (alarm) channel
The relay channel is an open/close switch (default
condition open). The channel is protected with a
resetting poly-fuse and can switch up to 1A.
2016 Delta-T Devices Ltd
Colour
DL6 terminal
(SM200)
V+
Red
IN+
White
Shield
IN-and 0V
Colour
DL6 terminal
(ML3)
V+
White
Brown
0V
IN+
Blue
Black
IN-
RES IN+
Grey
Green
terminal if required.
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