A-5
Appendix A
NOTE
The HART Communicator needs a minimum of 250 ohms resistance
in the loop to function properly. The HART Communicator does not
measure loop current directly.
FIGURE A-3. Connecting the HART
Communicator to a Transmitter Loop.
Power
Supply
Current
Meter
RL≥250V
8712-8712Q11A
Fuse
4–20 mA
4–20 mA
FIGURE A-4. Connecting the HART
Communicator with the Optional
Load Resistor.
Optional 250 ohm
load resistor
8712-0068A, 0275B01A
Fuse
4–20 mA –
4–20 mA +
Model 8732C
NOTE
Loop must be broken to insert
the optional 250 ohm resistor.
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