Note
The HART to Modbus Converter (HMC) equipped transmitter contains intrinsically safe
circuits that require the housing to be grounded in accordance with national and local
electrical codes. Failure to do so may impair the protection provided by the equipment.
Figure 4-10: Multidrop Connection of 5300 Level Transmitters
A. “A” line
B. “B” line
C. 120Ω
D. RS-485 bus
E. Modbus Master
F. Power supply
G. Internal ground screw
H. External ground screw
Alternatively, the Rosemount 5300 Level Transmitter can be installed as shown in Figure
4-11. If this wiring layout is used, there is an increased risk for communication
disturbances due to differences in potential between grounding points. By using the same
grounding point for Modbus Master and power supply, this risk is reduced.
Electrical installation Reference Manual
April 2019 00809-0100-4530
102 Rosemount 5300 Level Transmitter
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