Yokogawa HIMHART - Manual (Page 8)

HIM
8 The Interface Solution Experts
Smart HART  Loop
Interface and Monitor
Figure 4. Installing a HIM Into the Loop Using the Transmitter Excitation (+TX) Terminal
EMC (Electromagnetic Compatibility) directives
(EN55011, EN 50082-1, EN50082-2, etc.). Consult the
factory for the most current information on products
that have been CE certified.
Recommended Ground Wiring Practices
Moore Industries recommends the following ground
wiring practices:
• Any Moore Industries product in a metal
case or housing should be grounded.
• The protective earth conductor must be
connected to a system safety earth ground
before making any other connections.
• All input signals to, and output signals
from, Moore Industries’ products should be
wired using a shielded, twisted pair
technique. Shields are to be connected to an
earth or safety ground at the unit itself.
• The maximum length of unshielded input
and output signal wiring should be 2 inches.
Power Sourcing Parameters for General
Locations, Intrinsically Safe, and
Non-Incendive/Type N applications
In accordance with IEC 1010.1 Annex H
(all models), the input terminals must be
connected to and/or supplied from a certified
energy limiting Class 2 or a Separate Extra Low
Voltage (S.E.L.V.) power supply separated from
all mains by double/reinforced insulation.
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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