Honeywell HPM, Сервисная инструкция

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2 Equipment Description
2.13 Field Termination Assembly
R688 HPM High-Performance Process Manager Service 77
December 2020 Honeywell
Galvanically isolated FTAs
Galvanically Isolated type FTAs are listed in the following table.
Table 4 Galvanically Isolated Field Termination Assembly Types
FTA Type Description
High Level Analog Input
(HLAI/STI) 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.
24 Vdc Digital Input (DI) The 24 Vdc DI FTA accepts contact inputs. All inputs are isolated from each
other.
Analog Output (AO) The AO FTA provides isolated 4-20 mA outputs to proportioning loads such as
valves.
Analog Output (AO) HART 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.
24 Vdc Digital Output (DO) The 24 Vdc DO FTA provides isolated digital outputs to loads such as solenoid
valves or lamps.
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.