Foxboro N0311FA-D 2AX+A2 Module Auto-Manual Proportional Control

The Foxboro N0311FA-D 2AX+A2 module is a Auto-Manual Proportional Control Module, commonly used in legacy Foxboro SPEC 200 or I/A Series distributed control systems (DCS). It enables seamless transition between automatic and manual process control modes, with built-in proportional control capabilities. Technical Specifications: Manufacturer: Foxboro (by Schneider Electric) Model Number: N0311FA-D Module Type: Auto-Manual Proportional Control Module Function: • Provides automatic control with manual override capability • Executes proportional control logic for process variables • Used in analog process loops (e.g., temperature, flow, pressure control) Channels: 2AX + A2 (typically indicates dual analog input/output configuration plus auxiliary) Control Modes: • Automatic mode (uses controller input/output logic) • Manual mode (operator-adjustable output via local or remote signal) • Proportional mode for gain-controlled output response Input Signals: 4–20 mA or 1–5 V analog (typical) Output Signals: 4–20 mA control signal (to valve, actuator, or I/P transducer) Power Supply: Supplied via Foxboro backplane (typically 24 VDC logic level) Mounting: Plug-in module for Foxboro card cage or control rack Indicators: LED or analog needle indicators (module-dependent) Integration: Designed for legacy DCS environments; communicates with other control logic modules Application: Used in process industries—chemical, power, water treatment, and refining—for loop control with manual intervention capability Please review pictures carefully and let us know if you have any questions!