WOODWARD 8200-226 REV. A SPC Servo Position Controller

Product Brief Description

Woodward 8200-226 REV.A is an SPC (Servo Position Controller) digital servo valve driver module for MicroNet and NetCon turbomachinery control platforms. It executes high-precision closed-loop position control for hydraulic servo valves, receiving setpoint commands from the main CPU and reading LVDT/RVDT position feedback. REV.A is the original hardware revision with DeviceNet communication interface. This rack-mounted module converts digital commands into analog drive current for fuel and steam control valves, widely stocked as spare part for gas turbine, steam turbine and compressor control skids.

Product Features & Functions

• High accuracy closed-loop servo position control for hydraulic proportional servo valves
• Supports LVDT / RVDT position feedback; accepts dual redundant position sensors for reliability
• Configurable analog current output for servo coil driving, adjustable current range ±10mA to ±250mA
• DeviceNet fieldbus interface to receive position demand from MicroNet/NetCon master controller
• 24VDC power supply (18–32VDC wide input range), low power consumption
• Built-in continuous diagnostics: wire break, short circuit, feedback signal fault and internal hardware health check
• RS232 service port for on-site tuning, parameter backup and firmware upgrade using SPC service tool
• Metal rack housing, vibration-resistant design for turbine control cabinet environments
• REV.A hardware revision with DeviceNet protocol (later revisions offer CANopen variant as 8200-227)

Application Scenarios

• Gas turbine fuel control valve and steam turbine governor valve positioning control
• Centrifugal compressor anti-surge valve and recycle valve control skids
• Cogeneration CHP plants and captive power station turbomachinery control systems
• Oil & gas refinery and pipeline prime mover control cabinets
• MicroNet/NetCon system maintenance, spare replacement and control retrofits

FAQ