Quick Installation Guide
00825-0300-4728, Rev AA
July 2010
Rosemount 644
7
S
TEP
2
CONTINUED
...
Option 2:
1. Connect signal wiring shield to the sensor wiring shield.
2. Ensure the two shields are tied together and electrically isolated from the transmitter
housing.
3. Ground shield at the power supply end only.
4. Ensure that the sensor shield is electrically isolated from the surrounding grounded
fixtures.
Option 3:
1. Ground sensor wiring shield at the sensor, if possible.
2. Insure that 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.
Grounded Thermocouple Inputs
Option 4
1. Ground sensor wiring shield at the sensor.
2. Ensure that 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.
Sensor Wires
Profibus Loop
Shield ground point
Connect shields together, electrically isolated from the transmitter
Transmitter
Profibus Loop
Sensor Wires
Shield ground point
Transmitter
Profibus Loop
Sensor Wires
Shield ground point
Transmitter
4728_Rev AA.fm Page 7 Thursday, July 29, 2010 11:41 AM
