Controller Requirements And Connections; Wiring Overview; Stripped-And-Tinned Cable; Power Connections - In-situ Aqua Troll 400 Operator's Manual

Controller Requirements and Connections

The instrument can be connected to a controller or logger for communication via the following protocols.
SDI-12
l
RS485 Modbus
l
RS232 Modbus (with converter)
l

Wiring Overview

Refer to the diagrams on the following pages. Trim and insulate unused wires. The shielded wire should be wired to a chassis
ground or earth ground. See "Safety" on page 5

Stripped-and-Tinned Cable

Signal
Ground/Return
External Power
No Connection
RS485 (-)
RS485 (+)
SDI-12

Power Connections

The Aqua TROLL 400 requires an external 8 to 36 VDC power source. The red wire must be connected to the positive
terminal of the power source. The black wire must be connected to the negative terminal of the power source, which is often
referred to as the system ground or return.
800-446-7488
Color
Black
Red
Brown
Green
Blue
White
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