Foxboro FBMSVH - High-Performance Servo Valve Control Module for Foxboro I/A Series

Foxboro FBMSVH – High-Performance Servo Valve Control Module for Foxboro I/A Series

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Product Introduction:
The Foxboro FBMSVH is a specialized servo valve control module designed for the Foxboro I/A Series control system. The “FBMSVH” designation indicates this module is specifically engineered for closed-loop control of hydraulic and pneumatic servo valves. Unlike standard analog output modules, the FBMSVH provides high-frequency current output (up to 1kHz) with precise current control, making it ideal for controlling fast-acting servo valves used in turbine governor systems, mill roll positioning, and paper machine headbox control. This module contains a dedicated servo amplifier and position feedback loop, offloading the main controller from the demanding task of servo valve control.v

Technical Specifications:
Board Type: Servo Valve Control Module
System: Foxboro I/A Series (Series 2, Series 3)
Channels: 4 independent servo valve control channels
Output Signal: +/- 20mA or +/- 40mA (high-frequency current output)
Output Frequency: Up to 1000 Hz (1kHz) bandwidth
Position Feedback: Accepts LVDT feedback (voltage or current) for closed-loop position control
Resolution: 16-bit D/A conversion
Accuracy: +/- 0.02% of full scale
Update Rate: 1 millisecond (1000 Hz servo loop)
Isolation: 1500V RMS channel-to-channel
Control Modes: Position control, velocity control, and force (current) control
LED Indicators: Per-channel LEDs show valve position, command status, and fault conditions
Power: 5V DC and +/- 15V DC from I/A Series backplane
Form Factor: 3U Eurocard
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
High-Frequency Output: The 1kHz output bandwidth allows the module to control servo valves that require very fast response times (sub-millisecond).
Closed-Loop Position Control: Accepts LVDT feedback and automatically adjusts the output current to achieve the commanded valve position, eliminating the need for the main controller to run a PID loop.
Multiple Control Modes: Supports position, velocity, and force control modes, providing flexibility for different valve applications.
Per-Channel Tuning: Each channel has independent PID tuning parameters for the internal servo loop.
Fail-Safe Configuration: Configurable to drive the valve to a safe position (open, closed, or hold) on communication loss.
Built-In Servo Amplifier: The module contains its own power amplifier, eliminating the need for external servo amplifiers.