Preparation Of The Transmitter Cable; Electrical Connections - Michell Instruments PURA User Manual

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Pura Online Hygrometer User Manual

2.6

Preparation of the Transmitter Cable

2.6.1

Connector

GND

Warning: The sensor must be operated with the 4...20 mA signal return connected to

a suitable load, or negative power supply connection. Leaving this pin unconnected may

result in damage to the transmitter. Refer to wiring schematics later on in this document

for connection examples.

Note: The sensor cable is supplied as standard. Replacement pre-wired cables can be

obtained by contacting your local Michell Instruments representative or assembled by

the user according to instructions in the following section.

Michell Instruments

Michell Standard

Conductor Colour

Green

Red

Blue

Function

4...20 mA Signal Return (Power Supply -ve)

Power Supply +ve

Ground, Cable Screen Connection

This pin directly connects to the metal casing

of the transmitter, but not to the transmitter

electronics, and is intended for cable screening

only.

INSTALLATION

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