Endress+Hauser RB223 Mode D'emploi page 30

6 Operation
30
HART® Transmission
The RB223 is transparent for the transmission of the HART® signal i.e.
the HART® protocol can be transferred via the isolator.
The HART® signal is a frequency-modulated signal in the kilohertz
range which is superimposed on the loop current from 4 to 20 mA.
This makes it possible to communicate with HART®-enabled devices
and to make additional settings or to read out device parameters in
parallel with the loop current.
Further information can be found on the internet at
www.hartcomm.org.
Important technical settings:
Fig. 6: Connecting a HART® transmitter to RB223