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Wiringthepowersupplyandgroundingthetransmitter
Important
Follow the plant standards if a separate high-integrity intrinsically safe ground scheme is used.
If national standards or plant standards are not in effect, adhere to the following guidelines for grounding:
• Use copper wire, 14 AWG (2.5 mm
2
) or larger wire size.
• Keep all ground leads as short as possible, less than 1 Ω impedance.
• You can use the internal power ground terminal or the external ground terminal to ground the transmitter. Directly
connect the ground lead from the terminal to Earth ground.
• To achieve potential equalization and comply with ATEX standards for hazardous area installations, connect the
external ground terminal to the appropriate ground terminals within the hazardous area, using a potential-equalizing
line.
Procedure
Refer to Figure 3-2 for information on grounding the transmitter.
Figure 3-2 Grounding the 9739 MVD transmitter
A Power ground terminal
B External ground terminal
C Earth ground
10MicroMotion9739MVDTransmitters