WOODWARD 8400-061 Speed ​​controller Module

Controller Function in Governor System

The Woodward 8400-061 operates as the control center between speed sensing devices and the fuel control actuator.

Typical signal flow:

Speed Sensor (MPU)
↓
Woodward 8400-061 Controller
↓
Control Signal
↓
ProAct Actuator
↓
Fuel System Adjustment
↓
Engine Speed Regulation

The controller continuously compares:

Actual engine speed

Target speed setting

and adjusts actuator output to maintain the required operating speed.

Typical control functions include:

Engine speed monitoring

Speed setpoint adjustment

Actuator command output

Load response control

Overspeed protection interface

Start-up and shutdown control coordination

Woodward 8400-061 is commonly installed in industrial engines, generator sets, and power generation equipment where accurate speed regulation is required.

Related & Replacement Models

According to the official representative of Woodward's ProAct Speed Control product:

8400-061 is the successor replacement model of 8400-055.

Basic Relationship:

Why Was 8400-055 Replaced by 8400-061?

Woodward updated the ProAct Speed Control product range during its product lifecycle management process. The transition from 8400-055 to 8400-061 was mainly related to:

Product revision updates

Component availability improvements

Manufacturing changes

Compliance and lifecycle management requirements

The 8400-061 was introduced as the updated production version while maintaining the same application purpose within ProAct Fuel Limit Speed Control systems.

Are the Functions the Same?

For application purposes, the two models provide the same core control function.

Both controllers are designed to:

Receive engine speed feedback signals

Process speed control parameters

Provide actuator control output

Manage fuel limit control functions

Maintain engine operating speed according to configured settings

Can 8400-061 Directly Replace 8400-055?

In most applications:

Yes, Woodward 8400-061 can be used as a replacement for 8400-055.

However, before replacement, users should verify:

1. Original System Configuration

Confirm:

Engine model

Governor system configuration

Existing controller part number

2. Actuator Compatibility

Verify the installed actuator type, such as:

ProAct 75 actuator

Compatible ProAct actuator models

3. Application Parameters

After replacement, check configuration settings including:

Speed setting

Fuel limit parameters

Input configuration

Actuator calibration

Proper parameter verification is recommended to ensure correct operation.

The following models are related to Woodward 8400-061:

Replacement Note:

Although some models may have functional relationships, replacement must be confirmed according to:

Original equipment manufacturer requirement

Engine model

Actuator type

Wiring configuration

Software parameters