Emerson Rosemount 5300 Series - Page 98

Figure 4-6: Explosion-Proof /Flameproof (Ex d) Installations
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A. Loop Resistance (Ohms)
B. External Power Supply Voltage (Vdc)
C. Operating region
Note
For the Ex d case, the diagram is only valid if the load resistance is at the + side and if the -
side is grounded, otherwise the maximum load resistance is limited to 435 Ω.
4.6.3
Wiring diagram
Figure 4-7: Wiring Diagram for 4-20 mA/HART
®
+
-
+
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+
-
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(
A. Handheld communicator
B. Approved IS barrier (for Intrinsically Safe installations only)
C. HART modem
D. Current meter
E. Load resistance (≥250 Ω)
F. Power supply
Note
Rosemount 5300 Level Transmitters with flameproof/explosion-proof output have a built-
in barrier; no external barrier needed.
Electrical installation Reference Manual
April 2019 00809-0100-4530
98 Rosemount 5300 Level Transmitter