Emerson Rosemount 5400 Series - Hart; Power Requirements; Load Limitations

49
Reference Manual
00809-0100-4026, Rev HA
Section 4: Electrical Installation
November 2014
Electrical Installation
4.8 HART
4.8.1 Power requirements
The Rosemount 5400 Series transmitter operates with a power supply ranging from
16 - 42.4 Vdc (16 - 30 Vdc in IS applications, 20 - 42.4 Vdc in explosion-proof / flameproof
applications and in non-sparking / energy-limited applications).
All configuration tools for HART communication, such as the Field Communicator and
Rosemount Radar Master, require a minimum load resistance (R
L
) of 250 : within the loop in
order to function properly.
Terminals in the transmitter housing provide connections for signal wiring. The Rosemount
5400 Series operates with the following power supplies:
Table 4-1. Minimum Input Voltage (U
I
) at Different Currents
4.8.2 Load limitations
Maximum load resistance (R) is determined by the voltage level of the external power supply
(U
E
), as described by:
Figure 4-4. Non-Hazardous Installations, and Non-Sparking / Energy-Limited Power
Supply
Hazardous approval
Current
3.75 mA 21.75 mA
Minimum input voltage (U
I
)
Non-Hazardous Installations and
Intrinsically Safe Installations
16 Vdc 11 Vdc
Explosion-proof / Flameproof
Installations
20 Vdc 15.5 Vdc
10 2016 30
200
400
600
800
1000
1200
1400
40 50
42.424
586
1387
External Power Supply Voltage U
E
(V)
Maximum Load Resistance R(
W)
Operating
region