DESCRIPTION OF HART INTERFACE
9
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OPTIWAVE 1010
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10/2016 - 4003537403 - MA OPTIWAVE 1010 R03 en
9.3 Connection variants
The signal converter is a 2-wire device with 4...20 mA current output and HART
®
interface.
•
Multi-Drop Mode is supported
Multi-Drop Mode is supported
Multi-Drop Mode is supported
Multi-Drop Mode is supported
In a Multi-Drop communication system, more than 1 device is connected to a common
transmission cable.
•
Burst Mode is not supported
Burst Mode is not supported
Burst Mode is not supported
Burst Mode is not supported
There are two ways of using the HART
®
communication:
•
as Point-to-Point connection and
•
as Multi-Drop connection with 2-wire connection.
9.3.1 Point-to-Point connection
–
analogue / digital mode
Point-to-Point connection between the signal converter and the HART
®
Master.
The current output of the device is passive.
Also refer to
Point-to-point connection on page 30.
9.3.2 Multi-Drop connection (2-wire connection)
The device can operate in a network with a device address from 1 to 63.
For an illustration of multi-drop networks, refer to
Multi-drop networks on page 31.
9.4 HART
®
device variables
The HART
®
dynamic variables PV (Primary Variable), SV (Secondary Variable), TV (Third Variable)
and QV (Fourth Variable) can be assigned to any of the device variables.
The HART
®
dynamic variable PV is always connected to the HART
®
current output which is, for
example, assigned to level measurement.
