Woodward 8200-226 Servo Position Controller

Technical Dossier

Product Details And Specifications

WOODWARD 8200 Series Technical Notes

The Evolution of 8200 Series Architecture

The WOODWARD 8200 Series was developed as a modular analog and early digital control platform targeting turbine governor and actuator control applications. Early variants operated on discrete analog signal conditioning with hardwired setpoint inputs, designed for integration with WOODWARD hydraulic actuators and electro-hydraulic servo valves. As industrial control standards evolved through the 1990s and 2000s, the 8200 Series incorporated improved EMI shielding, expanded I/O channel counts, and compatibility with 4–20 mA process loops standard in DCS-integrated environments.

The series sits in the transition era between purely analog governors (such as the WOODWARD EG series) and fully digital platforms (such as the MicroNet and ProTech series). Many facilities running 8200 Series hardware have not migrated due to the cost and risk of turbine control system upgrades, creating sustained long-term demand for original spare modules. Compatibility with legacy WOODWARD actuators (e.g., TG-13, TG-17, EG-3P) is a key reason the 8200 Series remains in active service at sites with 20–40 year operational horizons.

8200 Series Full Catalog & Functionalities (SKU List)

The following models represent the verified active and legacy SKU range within the WOODWARD 8200 Series. Each unit is classified by primary function:

Servo & Position Controllers

• 8200-226: Servo position controller; analog feedback, single-channel actuator drive output for hydraulic servo valves.
• 8200-224: Servo amplifier module; drives electro-hydraulic actuators with 4–20 mA command input.
• 8200-414: Dual-channel servo controller; redundant output configuration for critical turbine applications.
• 8200-416: High-current servo driver; supports larger actuator coil loads up to 800 mA continuous.

Speed & Governor Control Modules

• 8200-292: Isochronous load-sharing governor module; used in parallel generator set applications.
• 8200-294: Speed control module with droop adjustment; compatible with magnetic pickup speed sensors.
• 8200-296: Overspeed detection module; hardwired trip output, fail-safe design for steam turbine protection.
• 8200-298: Load control module; integrates with KW transducers for baseload and import/export control.

Signal Conditioning & I/O Modules

• 8200-342: Analog input conditioner; accepts thermocouple and RTD inputs for temperature monitoring.
• 8200-344: 4–20 mA signal isolator and converter module; DIN rail mountable.
• 8200-346: Discrete I/O expansion module; 8 digital inputs, 4 relay outputs, 24 VDC logic.
• 8200-348: Analog output module; provides isolated 4–20 mA retransmission signals to DCS/SCADA.

Power Supply Modules

• 8200-102: 24 VDC regulated power supply module; 5A continuous, short-circuit protected.
• 8200-104: Dual-redundant power supply chassis; automatic switchover on primary failure.
• 8200-106: Battery-backed power module; maintains control output during momentary supply interruptions.

Communication & Interface Modules

• 8200-462: RS-232/RS-485 serial communication interface; supports MODBUS RTU protocol for DCS integration.
• 8200-464: Discrete hardwired interface panel; terminal strip assembly for field wiring termination.

Sourcing Hard-to-Find & Obsolete 8200 Series Parts

For obsolete models where no direct replacement exists, DriveKNMS provides cross-reference analysis to identify compatible WOODWARD successor modules (e.g., MicroNet TMR, ProTech-203) and can coordinate with engineering teams on retrofit feasibility assessments.

Quality Control for the 8200 Series Range

All 8200 Series modules processed by DriveKNMS undergo a structured inspection and functional verification protocol prior to dispatch: