Emerson Rosemount 3051S Reference Manual page 27

Reference Manual
00809-0100-4804, Rev AA
January 2011
Grounding
Figure 2-12. Loop Wire
Grounding (ERS Primary
Sensor)
Rosemount 3051S ERS System
Loop Wiring Grounding
Do not run signal wiring in conduit or open trays with power wiring or near
heavy electrical equipment. Ground the shield of the signal wiring at any one
point on the signal loop. See Figure 2-12. The negative terminal of the power
supply is a recommended grounding point.
NOTE:
Grounding the transmitter case using the threaded conduit connection may
not provide a sufficient ground. The transient protection terminal block (Option
Code T1) will not provide transient protection unless the transmitter case is
properly grounded. Do not run transient protection ground wire with signal
wiring; the ground wire may carry excessive current if a lightning strike
occurs.
Minimize
Distance
Positive
Negative
Insulate Shield
Connect Shield
Back to the Power
Supply Negative
Terminal
Trim Shield and
Insulate
2-19