Emerson 00825-0100-4530 Rev EC Load limitations, continued, Quick Installation Guide, 435Ω, March

Quick Installation Guide March 2013

Step 3 continued...

Load limitations

The Field Communicator requires a minimum load resistance of 250 Ω within the loop to function properly. The maximum load resistance can be obtained from the following diagrams.

Non-Hazardous Installations,	Explosion-proof/Flameproof (Ex d)
and Non-Sparking / Energy	Installations
Limited Power Supply

Operating region

Operating

region

R(Ω): Maximum Load Resistance	R(Ω): Maximum Load Resistance
UE(V): External Power Supply Voltage	U (V): External Power Supply Voltage
	E

Intrinsically Safe Installations

R(Ω): Maximum Load Resistance

UE(V): External Power Supply Voltage

NOTE:

For Flameproof / Explosion-proof installations, the diagram is only valid if the HART load resistance is at the + side and if the - side is grounded. Otherwise, the load resistance value is limited to

435Ω.

NOTE:

Rosemount 5300 Series Transmitters with Flameproof/Explosion-proof output have a built-in barrier; no external barrier needed.

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