Emerson Rosemount 644H Quick Start Manual page 7

Temperature transmitters with profibus pa

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January 2016

Note

Connect shields together, electrically isolated from the transmitter

Option 3

1. Ground sensor wiring shield at the sensor, if possible.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from

the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

A. Transmitter

B. Sensor wires

Grounded thermocouple inputs

Option 4

1. Ground sensor wiring shield at the sensor.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from

the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

A. Transmitter

B. Sensor wires

C. PROFIBUS loop

D. Shield ground point

C. PROFIBUS loop

D. Shield ground point

Quick Start Guide

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