Hart Analog Outputs (Hci-Hao); The Hci-Hao Board - Honeywell FlexLine SmartServo 954 Service Manual

COMMISSIONING

HART Analog Outputs (HCI-HAO)

7.3.9.1 Introduction
Figure 7-25
148
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.

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
LED LE1 is the board's
to indicate activity on the HART bus. LE2 indicates data is being
transmitted (Tx), LE3 indicates data is being received (Rx).
Service Manual
954 SmartServo FlexLine
7-25.
[Health]
LED. LEDs LE2 and LE3 will be flashing
Part No.: 4417340 Revision 1