Woodward 9905-211 701 Series Digital Speed Control Rev.J

Product Description

High-Performance Digital Governing for Reciprocating Engines

The Woodward 9905-211 is a 16-bit microprocessor-based digital speed control belonging to the versatile 701 series. Engineered for reciprocating engines in power generation, marine propulsion, and industrial automation, this module provides the precision of digital logic while maintaining compatibility with the classic 2301A load sharing family. The 9905-211 executes complex control algorithms to deliver fast, stable, and highly accurate speed regulation across a wide operating range, ensuring that engines respond dynamically to load transitions without compromising system stability.

Advanced Control Logic and Synchronization

This Rev.J version of the 9905-211 integrates essential governor functions, including PID control, start fuel limiting, and a programmable ramp generator. These features allow operators to fine-tune engine behavior specifically during the critical startup phase and when transitioning between idle and full load. While primarily a speed control, the 9905-211 is often utilized in conjunction with Woodward synchronizers and load sharing modules to enable seamless parallel operation of multiple units. It accepts frequency inputs from magnetic pickups (MPU) and generates a 0–200 mA output signal tailored for Woodward hydraulic and electric actuators.

Detailed Technical Specifications

The table below outlines the electrical and operational parameters for the 9905-211.