Rosemount 5300 Series

Reference Manual

00809-0100-4530, Rev BA July 2009

HART

Power Requirements

Maximum Loop

Resistance

Figure 4-1. Explosion-proof /Flameproof installations.

Terminals in the transmitter housing provide connections for signal cables. The Rosemount 5300 transmitter is loop-powered and operates with the following power supplies:

 

 

Current

 

3.75 mA

 

21.75 mA

Hazardous approval

Minimum input voltage (UI)

Non-Hazardous Installations and

16 Vdc

 

11 Vdc

Intrinsically Safe Installations

 

 

 

 

Explosion-proof / Flameproof

20 Vdc

 

15.5 Vdc

Installations

 

 

 

 

The input voltage for HART is 16-42.4 Vdc (16-30 Vdc in IS applications, and 20-42.4 Vdc in Explosion-proof / Flameproof applications).

The maximum current loop resistance (see Figure 4-5and Figure 4-6) is given by the following diagrams:

NOTE

This 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.

Operating

External Power

Region

Supply Voltage

 

Figure 4-2. Non-hazardous installations.

Operating

Region

Figure 4-3. Intrinsically Safe installations.

External Power Supply Voltage

Operating

Region

External Power

Supply Voltage

4-4

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Image 62
Emerson Process Management 5300 manual Hart, Power Requirements Maximum Loop Resistance, Current, 75 mA