HIM
12
The Interface Solution Experts
Smart HART
Loop
Interface and Monitor
Figure 6.
Installing a HIM Into the Loop Using the Transmitter Excitation (+TX) Terminal to Power a Transmitter
READY
INPUT
TRIP 2
TRIP 1
COM
0
ADDR
COMMON
NC (normally closed)
NO (normally open)
4-20mA
DCS
Sensor
Input
NO
NC
(+) DC
GND
–
+
24Vdc
Power
Source
(-) DCC
R must be > 250 and <1100 Ohms
R
HART Multivariable
Field Instrument
(Temperature,
Pressure, Level
and Flow)
Analog Output tied to
Any Process Variable
Event Recorder
HART Communicator
can be connected
anywhere on the loop
COM
+IN
+TX
–IN
1
2
3
4
5
6
7
8
9
0
.
—
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