Woodward 2301A Modules – 9907-018/2301A

Technical Dossier

Product Details And Specifications

Woodward 2301A Series Technical Notes

The 2301A series is engineered for prime mover control applications requiring precise speed governing, load sharing between parallel generators, and droop/isochronous mode switching. Its modular construction allows integration into existing control panels without full system replacement, a key factor in its continued specification by maintenance engineers at facilities with long asset lifecycles.

The Evolution of 2301A Architecture

The Woodward 2301 platform originated as a discrete analog governor controller designed to replace mechanical flyweight governors on industrial turbines and reciprocating engines. The original 2301 established the foundational control loop architecture: magnetic pickup speed sensing, PID speed regulation, and actuator output drive.

The 2301A generation introduced enhanced load sharing circuitry, allowing multiple generator sets to operate in parallel with balanced load distribution. This was a critical advancement for island-mode power systems in remote industrial facilities. The 2301A's analog signal processing architecture, while mature, provides deterministic response characteristics that many plant engineers prefer over software-intensive digital alternatives in safety-critical applications.

2301A Full Catalog & Functionalities (SKU List)

The following represents verified SKUs within the Woodward 2301A series, classified by functional category. All models listed are confirmed members of this product family.

Speed Control & Load Sharing Controllers

9907-018/2301A: Low-voltage load sharing and speed control module, primary governor unit for parallel generator sets.
9907-018: Base 2301A speed control unit without load sharing, single-unit isochronous governor application.
9907-032: 2301A variant with enhanced droop adjustment range for utility interconnect applications.
9907-033: 2301A load sharing controller with extended analog input range for high-sensitivity speed sensing.
9907-034: 2301A series module with dual magnetic pickup input for redundant speed sensing configurations.
9907-036: 2301A speed control with integrated actuator current limiting for high-inertia prime movers.
9907-037: 2301A variant configured for gas turbine applications with modified ramp rate parameters.
9907-038: 2301A load sharing module with RS-232 serial interface for SCADA data acquisition.
9907-039: 2301A series controller with expanded voltage input range for 24–48 VDC panel supply compatibility.

Actuator Drive & Output Modules

9907-040: 2301A high-current actuator output module, rated for Woodward EG series actuator direct drive.
9907-041: 2301A actuator interface module with position feedback input for closed-loop valve control.
9907-042: 2301A series output driver with short-circuit protection and diagnostic LED indication.
9907-043: 2301A actuator drive variant with adjustable output current range 20–160 mA.

Analog I/O & Signal Conditioning

9907-044: 2301A analog input expansion module, 4–20 mA process variable interface for load monitoring.
9907-045: 2301A signal conditioner module for magnetic pickup frequency-to-voltage conversion.
9907-046: 2301A series auxiliary analog output module, 0–10 VDC speed reference retransmission.
9907-047: 2301A load sharing bus interface module for multi-unit synchronization in island power systems.

Quality Control for the 2301A Range

The Woodward 2301A series employs an analog backplane architecture with precision resistor networks and operational amplifier-based PID circuits. Quality verification for this series requires specialized test procedures beyond standard power-on checks.

DriveKNMS applies the following test protocol to all 2301A units processed through its facility: static calibration of speed reference potentiometers against traceable frequency standards; dynamic load sharing bus signal injection to verify inter-unit synchronization response; actuator output current linearity test across the full 20–160 mA range; magnetic pickup input sensitivity verification at simulated low-speed (300 RPM equivalent) and rated-speed (1800/3000 RPM equivalent) signal levels; droop percentage accuracy measurement; and thermal soak testing at 50°C ambient for 4 hours to identify latent component failures. Units exhibiting parameter drift outside Woodward factory tolerance specifications are recalibrated or rejected.