User guide

7 DESCRIPTION OF HART INTERFACE
34
SMARTSENS PH 8570
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7.3 Connection variants
The sensor is a 2-wire device with a passive 4...20 mA current output and HART
®
interface.
• Multidrop mode is supported
Multidrop mode is supportedMultidrop mode is supported
Multidrop mode is supported
In a multidrop communication system, more than 2 devices are connected to a common
transmission cable.
• Burst mode is not supported
Burst mode is not supportedBurst 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 Multidrop connection, with 2-wire connection.
INFORMATION!
For detailed information about the electrical connection of the sensor for HART
®
, refer to
Connecting with junction box SJB 200 W on page 14
.
.book Page 34 Monday, November 18, 2013 4:44 PM