
Reference Manual
00809-0600-4026, Rev BA
December 2011
Rosemount Process Radar
2-8
Type n Approvals : Non-Sparking / Energy Limited Power Supply
Load Limitations
The Field Communicator requires a minimum load resistance of 250 within
the loop to function properly. The maximum load resistance can be obtained
from the following diagrams.
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 435 .
NOTE
Rosemount 5300 Series Transmitters with Flameproof/Explosion-proof
Output have a built-in barrier; no external barrier needed.
Load Resistance
250
Power
Supply
HART
Modem
Field
Communicator
PC
Rosemount 5300 Series
Transmitter
HART: U
n
= 42.4 V
R(): Maximum Load Resistance
U
E
(V): External Power Supply Voltage
Explosion-proof/Flameproof (Ex d)
Installations
Non-Hazardous Installations, and
Non-Sparking / Energy Limited Power Supply
R(): Maximum Load Resistance
U
E
(V): External Power Supply Voltage
Operating
region
Operating
region
Intrinsically Safe Installations
R(): Maximum Load Resistance
U
E
(V): External Power Supply Voltage
Commentaires sur ces manuels