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• If you are not using a barrier:
a. Connect the VDC wires from the core processor (see
Figure 12) to an independent power supply. This power
supply must connect only to the core processor. A
recommended power supply is the SDN series of 24-VDC
power supplies manufactured by Sola/Hevi-Duty.
b. Do not ground either connection of the power supply.
c. Connect the RS-485 wires from the core processor (see
Figure 12) to the RS-485 terminals at the direct host. Refer to
the vendor documentation to identify the terminals.
d. Ensure that there is no electromagnetic interference coupled
onto the cables between the core processor and the power
supply or direct host.
STEP 6. Grounding the sensor
The sensor must be grounded. The sensor may be grounded via the piping
if the joints in the pipeline are ground-bonded. If the sensor is not
grounded via the piping, connect a ground wire to the sensor ground
screw.
If using an integral booster amplifier, it is grounded with the sensor. If
using a remote booster amplifier, it must be grounded separately, using
the internal or external ground screw as required.
CAUTION
Improper grounding could cause measurement error.
To reduce the risk of measurement error:
• Ground the flowmeter to earth, or follow ground
network requirements for the facility.
• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not
apply.
