Emerson Rosemount 644 Reference Manual page 74

Section 4: Operation and Maintenance
April 2015
4.
Grounded thermocouple inputs
Option 1
1.
2.
3.
4.
64
Ground signal wiring shield at the power supply end.
A
A. Sensor wires
B. Transmitter
C. Shield ground point
Ground sensor wiring shield at the sensor.
Ensure the sensor wiring and signal wiring shields are electrically isolated from the
transmitter housing.
Do not connect the signal wiring shield to the sensor wiring shield.
Ground signal wiring shield at the power supply end.
A
A. Sensor wires
B. Transmitter
C. Shield ground point
B
C
B
C
Reference Manual
00809-0200-4728, Rev RA
Electrical Installation