Foxboro I/O Card

Foxboro I/O Cards, also known as fieldbus modules (FBMs), are critical components of the Foxboro I/A Series Distributed Control System (DCS). These modules act as the interface between the DCS and field devices, facilitating data acquisition, control signal transmission, and process health monitoring.

Types of Foxboro I/O Cards

1. Analog Input Cards:

   • Function: Convert analog signals from field devices (e.g., temperature transmitters, pressure sensors) into digital signals for the DCS.
   • Application: Used for measuring variables like temperature, pressure, and flow.

2. Analog Output Cards:

   • Function: Convert digital control signals from the DCS into analog signals to control actuators (e.g., valves, motors).
   • Application: Used for precise control of processes that require variable output.

3. Discrete Input Cards:

   • Function: Receive digital signals from field devices (e.g., switches, limit sensors) indicating the status of process parameters.
   • Application: Used for monitoring on/off status or binary conditions in the process.

4. Discrete Output Cards:

   • Function: Send digital control signals to field devices (e.g., relays, solenoids) to activate or deactivate specific components.
   • Application: Used for controlling binary outputs, such as starting/stopping motors or opening/closing valves.