KROHNE OPTISONIC 3400 EN - Manual (Page 116)

9
DESCRIPTION OF HART INTERFACE
116
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
9.3 Connection variants
The signal converter is a 4-wire device with 4...20 mA current output and HART ® interface.
Depending on the version, the settings and the wiring, the current output can operate as passive
or active output.
• 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 2 devices are 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
In the Burst Mode a slave device transfers cyclic pre-defined response telegrams, to get a
higher rate of data transfer.
There are two ways of using the HART ® communication:
• as Point-to-Point connection and
• as multi-drop connection, with 2-wire connection or
as multi-drop connection, with 3-wire connection.
INFORMATION!
For detailed information about the electrical connection of the signal converter for HART
® , refer
to the section "Electrical connection".