Galvanically Isolated Ftas; Three Physical Sizes; Table 4 Galvanically Isolated Field Termination Assembly Types - Honeywell HPM Service

Galvanically isolated FTAs

Galvanically Isolated type FTAs are listed in the following table.

Table 4 Galvanically Isolated Field Termination Assembly Types

FTA Type
High Level Analog Input
(HLAI/STI)
24 Vdc Digital Input (DI)
Analog Output (AO)
Analog Output (AO) HART
24 Vdc Digital Output (DO)

Three physical sizes

The standard FTAs have three physical sizes as illustrated in the following figure. The Galvanically
Isolated FTAs are one size only, B-size.
R688
December 2020
The HLAI/STI FTA accepts high level analog inputs. Some FTA models also
interface with Smart Transmitter devices. All inputs are isolated from ground and
each other.
The 24 Vdc DI FTA accepts contact inputs. All inputs are isolated from each
other.
The AO FTA provides isolated 4-20 mA outputs to proportioning loads such as
valves.
Provides 4-20 mA outputs, and incorporates circuitry to allow HART field devices
to be connected to the FTA without using external filters. These FTAs also
provide a connector for an external HART multiplexer.
The 24 Vdc DO FTA provides isolated digital outputs to loads such as solenoid
valves or lamps.
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2 Equipment Description
2.13 Field Termination Assembly
Description
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