User Manual

Commissioning
SmartRadar FlexLine Part No.: 4417.762_Rev07
6 - 122 Service Manual
6.9 HART Analog Outputs (HCI-HAO)
6.9.1 Introduction
The Host Communication Interface – HART Analog Output (HCI-HAO)
is a HART® slave module which communicates with the associated
HART master over the HART bus.
ESF09-0005
FIGURE 6-32 The HCI-HAO board
The HART protocol is a bi-directional master-slave communication
protocol, which is used to communicate between intelligent field
instruments and host systems.
The HCI-HAO board has a planar transformer for galvanic isolation from
the HART bus. See FIGURE 6-32.
LED LE1 is the board’s
[Health] LED. LEDs LE2 and LE3 will be flashing
to indicate activity on the HART bus. LE2 indicates data is being
transmitted (Tx), LE3 indicates data is being received (Rx).
LE1
LE2LE3
planar
transformer