
Reference Manual
00809-0600-4026, Rev BA
December 2011
5-7
Rosemount Process Radar
Non-Intrinsically Safe Power Supply
Intrinsically Safe Power Supply
Type n Approvals: Non-Sparking / Energy Limited Power Supply
Load Limitations
The Field Communicator requires a minimum load resistance of 250 Ohms
within the loop in order to function properly. The maximum load resistance is
shown in the following diagram.
Load Resistance 250
Power
Supply
HART
Modem
Field Communicator
PC
Rosemount 5400 Series Radar Level Transmitter
Power
Supply
R
L
250
Approved
IS Barrier
Field Communicator
PC
IS Parameters:
U
i
=30 V, I
i
= 130 mA,
P
i
=1 W, C
i
=7.26 nF,
L
i
=0 H,
HART
Modem
Rosemount 5400 Series Radar Level Transmitter
Load Resistance 250
Power
Supply
HART
Modem
Field Communicator
PC
Rosemount 5400 Series Radar Level Transmitter
HART: U
n
=42.4 V
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