Sentek RT6, Hardware Manual

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SENTEK
Page 86
communication with computer
Compatibility The RT6 Main Board is a direct replacement for the
RT5 Main Board (only with receiver).
The RT6 will work with probe runs having 4-wire
boards with transmitters.

Caution:
Connecting probe runs with 4-wire boards (no
transmitters) to the RT6 Main Board may cause
damage to components.
Removable Logger firmware revision
The RT5 logger will work with the RT6 Main Board
and the RT6 logger will work with the RT5 Main
Board.
However the logger must be RT6 version (with RT6
Main Board) to enable remote telemetry via multi-
drop RS485 or radio.
Only RT6 logger model MRT6.3 with firmware
RTtype991111 supports all RT6 system features.
Features of earlier versions can be viewed on the
Sentek Web site Support > FAQ's > Version Table >
RT5 / RT6 Loggers.
IrriMAX software will work with RT5 loggers.
Comparison of 4-wire and 5-wire board
The 5-wire board is the combination of the circuitry
of the 4-wire board and transmitter. In addition to this
the 5-wire board has resetable fuses to resist damage
if a surge occurs during sampling. These fuses
automatically reset themselves when power is
removed (between sampling).
Compatibility Probes with 5-wire boards can be mixed on a probe
run with probes having 4-wire boards (only with
transmitters).
EasyAG only support 5-wire boards.

Caution:
Probes on a run with 5-wire boards will not work
with probes on the same run with 4-wire boards
(without transmitters). Damage to components may
occur if connected together on the same run.