Woodward 9905-866 – Overview

Woodward 9905-866 is an electronic speed governor / load-sharing control from the Woodward 2301A LSSC series, widely used for diesel & gas engines, generators, and turbines in industrial and marine power systems.

Product Role & Typical Applications

The 9905-866 is designed to maintain stable engine speed and load sharing when multiple generator sets operate in parallel.

Typical applications:

• Diesel / gas generator sets
• Marine propulsion & shipboard generators
• Industrial power plants
• Gas & steam turbine auxiliary systems

These controls allow engines to operate in isochronous mode (constant speed) or droop mode (load sharing) depending on system requirements.

Series Background (2301A LSSC)

The 9905 / 9907 family belongs to the Woodward 2301A Load Sharing & Speed Control platform, designed for:

• Single or multiple actuator systems
• Forward-acting or reverse-acting configurations
• Low-voltage or high-voltage models
• Reliable operation in harsh industrial environments

Key Functions of 9905-866

1) Engine Speed Control

The governor continuously monitors engine speed using a magnetic pickup sensor (MPU) and adjusts actuator output to keep RPM stable.

Core control modes:

• Isochronous: constant speed regardless of load
• Droop: proportional speed change for load sharing

2) Load Sharing Capability

The 9905-866 allows multiple generators to run in parallel by sharing load through an analog load-sharing line, preventing:

• Overload of one generator
• System instability
• Blackouts or tripping

3) Actuator Control Output

Typical actuator signal:

• 0–200 mA actuator current output
• Supports single actuator systems
• Compatible with Woodward electric actuators

4) Rugged Industrial Design

The 2301A platform is known for:

• Wide operating temperature range (approx. −40°C to +85°C)
• High vibration & shock resistance
• Reliable operation in marine & power plant environments

Typical Technical Characteristics (Series Reference)

While variants differ slightly, the 9905-866 generally aligns with these 2301A specs:

Advantages

• Proven industry-standard governor
• Excellent parallel generator stability
• High reliability for continuous duty
• Long lifecycle & global service support
• Ideal for retrofit and replacement

Summary

The Woodward 9905-866 is a trusted 2301A electronic governor designed to deliver precise engine speed control and stable load sharing in demanding power generation environments. It remains a common replacement and upgrade choice for older Woodward governor systems.

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Our Main Brand

ABB, GE, Allen Bradley, Honeywell, Emerson, Bently Nevada, Prosoft, Siemens, Westinghouse, Triconex, Foxboro, ICS Triplex, Hima, Schneider, Yokogawa, Woodward, B&R, KEBA, etc

—-(DCS)Distributed Control System

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Invensys Foxboro FBM214,FBM242,B0123HE

Invensys Triconex 3625,3700A,3604E

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HIMA F2-DO-16-02,F8650E

Yokogawa SAI143-S03 S1, F9342L-02

Honeywell 51402497-200,51403519-160,51199194-100,CC-PDO801

Emerson KJ4001X1-NB1,12P3368X012

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Rockwell AB 1734-IB8,1734-OB8,1769-L18ER-BB1B,1756-IM16I

ICS Triplex T8461,T8850,T8403,T8431,T8831,T8310

Schneider Modicon 140DDI85300

GE Fnauc IS210AEPSG2B,IS220UCSAH1A,IS215ACLEH1A,IS210AEAAH1B

Siemen 6ES7331-1KF02-0AB0

Prosoft MVI46-DFNT

Bachmann MPC240

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Bently Nevada 3500/22M,138607-01,3500/25,3500/53,3500/32M 149986-02,

EPRO MMS6110,MMS6120,MMS6220,MMS6312,MMS6410,6423,6424,

ENTEK EK C6622HS,XM124,1440-SDM02-01RA

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❓FAQ

Q:What is the earliest time when you can make delivery?

A:We will make delivery once received your payment.

Q:If the product can’t work, can it be returned?

A:We provide one year warranty.

Q:How easy is it to obtain items?

A:New are no longer continuously manufactured, and therefore supply is scarce.

However, at SAUL we specialize in sourcing hard-to-find products, and although

the lead time varies, the average is between 5-7 business days.

Q:What is the typical price for the items?
A:SAUL ELECTRIC always gives customers excellent service and prices that

are highly competitive.Requirements for delivery and availability do affect pricing.