Overview

The Woodward 9905-211 is part of the 701 series of digital speed controls, designed for reciprocating engines in power generation, marine propulsion, and industrial automation. It uses a 16-bit microprocessor to deliver fast, stable, and accurate speed control across a wide operating range. The unit is part of the 2301A family, known for reliability and adaptability in demanding environments.

The 9905-211 supports PID control, start fuel limiting, and ramp generator functions, allowing operators to fine-tune engine behavior during startup and load transitions. It integrates with Woodward load sharing modules, enabling parallel operation of multiple generators or engines.

The controller accepts frequency input signals from magnetic pickups and provides a 0–200 mA actuator output, compatible with Woodward actuators. It is housed in a rugged panel-mounted enclosure with LED indicators for diagnostics and status monitoring.

Technical Data

Typical Applications

• Power Generation Systems: Regulates engine speed and load sharing in genset configurations.

• Marine Propulsion Engines: Ensures stable speed control under varying load conditions.

• Industrial Compressors and Pumps: Supports precise actuator control for process optimization.

• Parallel Generator Operation: Enables synchronized load sharing across multiple units.

• Retrofit Projects: Upgrades analog governors to digital control in existing systems.

FAQ

Q1: What type of engines is the 9905-211 designed for?
A1: It is optimized for reciprocating engines in industrial and marine settings.

Q2: What actuator output does it provide?
A2: It delivers a 0–200 mA current signal for Woodward actuators.

Q3: Can it be used for load sharing?
A3: Yes, it integrates with Woodward load sharing modules.

Q4: What is the input signal format?
A4: It accepts frequency input from magnetic pickups (500–15,000 Hz).

Q5: Is it suitable for outdoor use?
A5: It must be installed in a protected enclosure due to environmental sensitivity.