Connecting to loggers or controllers
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15
Connecting to loggers or controllers
The WET150 is fully compliant with the SDI-12 communication protocol
standard (version 1.3). Because of this the WET150 can be used with any
third-party logging or metering device which is also SDI-12 compliant as
well as with Delta-T Devices GP2 logger controllers and the WET150 Meter.
Wiring
GP2 Logger Wiring
Other loggers and systems wiring:
** Optional. The green wire is connected to the cable screen. The SDI-12
specification does not require the green wire / cable screen connected.
If there is a lot of electrical noise in the environment, connecting the green
screen wire to ground in the logger or controller may help reduce data
corruption.
For other connection details to third-party loggers and controllers please
consult the SDI-12
sections of those products’ manuals.
For SDI-12 screw terminal cable
connector information see pages
12, 32 and 33 of the
SDI-12 for
GP2 User Manual
on page 26
Wire colour
Logger or
controller
SDI-12 function
M12 connector
pin
Brown
Not connected
1
White
+12V 0.5A
Network power
2
Blue
GND
Ground (for power and data)
3
Black
DATA
Data (send and receive)
4
Grey
Not connected
5
Green
Not connected **
(Cable screen) **
Shell / nut
4
4
5
1
3
2
GROUND
SDI-12 DATA
SDI-12 POWER
SCREEN (if present)
4
4
5
1
3
2
GROUND
SDI-12 DATA
SDI-12 POWER