Emerson Rosemount 5300 Series - Wiring diagram; Grounding

4.5.2 Wiring diagram
Figure 4-6: Wiring Diagram for RS-485 with Modbus
®
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+
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%
&&
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A. “A” line
B. “B” line
C. 120 Ω
D. RS-485 Bus
E. Power supply
F. HART -
G. HART +
H. If it is the last transmitter on the bus, connect the 120 Ω termination
resistor.
Note
Rosemount 5300 Level Transmitters with Flameproof/Explosion-proof output
have a built-in barrier; no external barrier needed.
(1)
4.6
Grounding
Make sure grounding is done (including IS ground inside Terminal
compartment) according to Hazardous Locations Certifications, national and
local electrical codes.
(1)
An external galvanic isolator is always recommended to be used for Flameproof/
Explosion-proof installations.
Quick Start Guide February 2019
16 Rosemount 5300 Level Transmitter