Yokogawa HIMHART - Manual (Page 3)

The Interface Solution Experts 3
HIM
Smart HART  Loop
Interface and Monitor
The HIM
The Moore Industries HIM HART Interface Module
unlocks the full potential of new and in-place HART
multivariable transmitters, valves, meters and other
smart instruments.
Converts HART to 4-20mA Signals
The HIM allows up to three additional analog process
variable measurements from a multivariable transmit-
ter or valve with no additional process penetrations.
Installed transparently across the 4-20mA instrument
loop, the HIM reads the HART digital process data that
rides on the loop wires. It converts the digital informa-
tion for up to three isolated analog (4-20mA) process
signals that are readily accepted by in-place control
systems, such as a DCS or PLC.
Provides Process and Diagnostic Alarms
Relay alarm trips (optional) can be individually user-set
either to trip when unwanted high/low process condi-
tions occur, or provide a diagnostic health warning to
alert of loop or instrument fault conditions.
Takes Advantage of Legacy Instruments
The device lets you leave existing smart HART trans-
mitters and valves in place, yet still take advantage of
all the information they have to offer.
Works with every Smart HART Device
The instrument can be programmed in minutes to inter-
face with every HART-compatible monitoring and con-
trol device.
About this Manual
Wherever you see a “ Note”, “Caution”, or “WARNING ”
pay particular attention.
• A “ Note” provides information to help you in
avoiding minor inconveniences during
calibration, installation or operation of the HIM.
• A “ Caution” provides information on steps to take
to avoid procedures and practices that could risk
damage to the HIM or other equipment.
• A “ WARNING ” provides information on steps to
take to avoid procedures and practices that could
pose safety risks to personnel.
Figure 1. The HIM Accepts a Digital HART Signal and Outputs Both Analog Signals and Alarm Relays
4-20mA Representing the
Primary Variable (Mass Flow)
HIM HART Interface Module
"Breaks Out" Data from
Smart HART Instruments
(HART Primary Master)
4-20mA Proportional to 2nd Variable (DP)
Control System
(DCS or PLC)
Smart HART
Multivariable
Mass Flow
Transmitter
4-20mA Proportional to 3rd Variable (P)
4-20mA Proportional to 4th Variable (T)
High Alarm in Response to 4th Variable (T)
HART Transmitter Fault Alarm
Flow
HART Communicator can
be connected anywhere
along the 4-20mA loop
(HART Secondary Master)
HART Digital Signal Carrying Primary,
Second, Third, Fourth Variable Process Data,
and Instrument Diagnostic Information