Yokogawa HIMHART - Manual (Page 7)

The Interface Solution Experts 7
HIM
Smart HART  Loop
Interface and Monitor
Installing the HIM
There are two methods for connecting the HIM for
configuration. The recommended method requires you
to install the instrument into the loop before it is
configured. The secondary method allows you to bench
check the HIM by attaching it to test equipment that
will simulate the input and monitor the output.
Installing the HIM into the Loop
Installation consists of physically mounting the unit,
grounding the instrument, and completing the electrical
connections. To install the HIM into the loop for
configuration, use the equipment in Table 2 to hookup
the HIM into the loop as shown in Figure 3 (without
using the HIM to power a transmitter) or Figure 4 (using
the TX terminal to power a transmitter). If you need a
complete terminal description, refer to Table 1.
Mounting
The HIM is designed to snap easily onto 32mm, G-type
(EN50035) or 35mm Top Hat (EN50022) DIN rails.
Electrical Connections
After mounting, you are ready to connect the HIM to
the loop. Each unit comes equipped with a transmitter
excitation terminal which allows it to supply power to
the monitored HART instrument, if necessary. Figures
2 and 3 show the connection diagrams for an HIM with
or without using the transmitter excitation current.
CE Conformity
Installation of any Moore Industries products that carry
the CE certification (Commission Electrotechnique)
must adhere to the guidelines in Installing the HIM in
order to meet the requirements set forth in applicable
Figure 3. Installing a HIM Into the Loop Without Using the Transmitter Excitation (+TX) Terminal
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
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 –IN
24Vdc
Power
+ –
R must be > 250 and <1100 Ohms 1 2
3
4
5
6
7
8
9
0
.
—
➤
➤
➤
➤ ➤ ➤
➤
25.1
deg-c
80.1
20.3
50.7