Foxboro FXAOM01AD Analog Output Module

Model Series: FXA Series — I/A Series Analog Output
Manufacturer: Foxboro (Schneider Electric / Invensys)

Product Overview:
The FXAOM01AD is a single-channel analog output module from the Foxboro I/A Series FXA family. It converts digital control signals from the processor into a 4–20 mA, 2-wire analog current output for driving field control valves, actuators, and other final control elements.

Category:
Description

Technical Specifications:

Parameter Value
Channels 1 Channel
Output Signal 4–20 mA, 2-Wire Transmitter Powered
Resolution 16-Bit (65,536 Steps)
Accuracy ±0.1% of Full Scale
Linearity ±0.05% of Full Scale
Update Rate 100 ms (10 Hz)
Output Load 0–600 Ω (Max)
Compliance Voltage 12–30 VDC
Isolation 500 VAC channel-to-bus
Operating Temperature 0°C to +60°C (32°F to +140°F)
Power Consumption <2.5 W per channel

Structural Features:

  • Plug-in module for I/A Series I/O carrier
  • Screw-clamp terminal blocks for field wiring
  • Status LEDs for channel OK, fault, and communication
  • DIP switches or software configuration for range scaling

Functional Features:

  • Supports HART 5/7 protocol overlay on 4–20 mA output
  • Programmable output range (e.g., 0–100%, 4–20 mA mapping)
  • Fail-safe output options: Hold Last Value, Output Zero, Output High
  • Software-configurable damping and signal filtering

Working Principle:
The module receives a 16-bit digital value from the I/A Series controller via the backplane bus. A precision DAC converts this value to a proportional 4–20 mA current signal. The 2-wire loop power is supplied through the module, eliminating the need for a separate power supply at the field device.

Advantage Highlights:

  • High 16-bit resolution ensures precise control
  • HART communication enables remote diagnostics and configuration
  • Redundant I/O carrier support for safety-critical loops
  • Low drift over temperature ensures long-term accuracy

Applicable Industries:
Oil & Gas, Chemical, Power Generation, Refining, Water Treatment, Mining

Installation Requirements:

  • Install in I/A Series I/O carrier with proper slot allocation
  • Use shielded twisted-pair cable for field connections
  • Ground shield at control room end only
  • Verify loop resistance does not exceed 600 Ω

Usage Precautions:

  • Do not apply voltage to output terminals externally
  • Ensure loop power supply is disabled during wiring
  • Calibrate using HART communicator or I/A Series configuration software
  • Observe proper ESD precautions during handling
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