Product Model: WOODWARD 5441-671

Brand: WOODWARD (Woodward)

Product Type: NetCon 5000 / MicroNet Series Digital Speed Control Module

Generation Time: 2026-05-18 11:32:57

I. Product Overview

WOODWARD 5441-671 is a high-performance digital speed controller module specifically designed for the NetCon 5000 and MicroNet control systems. As the core control unit, it provides high-precision speed regulation, overspeed protection, and load control for rotating machinery such as steam turbines, gas turbines, and engines. This module is a discontinued model, and the market mainly circulates refurbished / spare parts. 

II. Core Functional Characteristics

High-precision speed control: Utilizing a 32-bit digital processor, it offers both "isochronous" and "droop" modes for adjustment, with a speed control accuracy of ±1 rpm.

Dual sensor input: Supports dual redundant speed signals from MPU/ eddy current sensors, ensuring reliable and robust speed acquisition.

Multiple protection mechanisms: Built-in overspeed protection, under-speed protection, and sensor fault diagnosis to ensure safe operation of the equipment.

Highly reliable drive output: Provides 4-20mA / 0-10V standard analog signals to directly drive electro-hydraulic actuators, speed governors, and servo valves.

Dynamic response optimization: Control cycle < 10ms, providing rapid response to speed fluctuations, suitable for high dynamic performance requirements of the units.

Full isolation design: Electrical isolation of signal input, control output, and system power supply (2500V AC), effectively suppressing industrial site interference.

Hot-swappable and diagnostic: Supports hot-swappable maintenance, equipped with LED status indicators and fault codes, facilitating quick problem identification.

Industrial-grade stability: Wide temperature range, shock resistance, dustproof design, meeting the demanding industrial environment of 24/7 continuous operation.

III. Technical Specifications

1. Core Control Parameters

Control type: Digital PI/PID speed controller

Processor: 32-bit industrial-grade dedicated processor

Control cycle: < 10 ms

Speed accuracy: ± 1 rpm

Speed range: 0 - 15,000 rpm (compatible with MPU sensors)

Adjustment mode: Isochronous adjustment, Droop adjustment

Control algorithm: Adaptive PID, parameters self-tuning

2. Input/Output Interfaces

Speed input: 2 channels, MPU eddy current sensor (differential signal, 0-15kHz)

Analog output: 1 channel, 4-20mA / 0-10V DC (drives actuators)

Switching I/O: 4 channels DI (start / stop / reset), 4 channels DO (alarm / stop / status)

Communication interface: RS-232 (for configuration, monitoring, program download)

Isolation voltage: 2500 V AC (input - output - power supply)

3. Physical and Environmental Specifications

Dimensions (W×H×D): 229 mm × 178 mm × 45 mm

Weight: Approximately 0.85 kg

Operating power supply: 24 VDC ±10%

Operating temperature: -40°C ~ +70°C

Storage temperature: -55°C ~ +85°C

Humidity: 5% ~ 95% RH (no condensation)

Protection grade: IP20

4. Product Status

Product status: Discontinued (Out of Production)

Alternative model: 8406-101 (New generation NetCon speed control module, in service)

Comparison within the series:

5441-635: CPU main controller (discontinued)

5441-671: Digital speed control module (discontinued)

5441-669: Synchronization / Load Sharing Module (discontinued)

5441-661: 10A Relay Output Module (discontinued)

IV. Typical Application Scenarios

Steam turbine control: Industrial steam turbines, power steam turbines, back-pressure steam turbines, speed regulation, load control, overspeed protection.

Engine control: Diesel engines, gas engines, speed control, load sharing in parallel.

Gas turbine control: Small gas turbines, aircraft modified gas turbines, start-up control, closed-loop speed regulation. Turbo machinery control: anti-surge control for centrifugal compressors, axial flow compressors, expanders, speed interlock protection.

Industrial automation: independent / redundant speed control for key rotating equipment in steel mills, petrochemical plants, power plants, etc.

V. System Configuration and Compatibility

1. Essential Components

Main Controller: 5441-635, 5435 series CPU

Power Module: 5439-766 (24VDC system power supply)

Rack: 5439-861 (12-slot standard rack)

Actuators: Electro-hydraulic converter (I/H), electro-hydraulic actuator, servo valve

Sensors: MPU eddy current speed sensor

2. Compatible Systems

Fully compatible: NetCon 5000, MicroNet control system

Specifically compatible: WOODWARD 505/505E, 723/723+ controller

VI. Quality and Service

Origin: USA (WOODWARD original factory)

Warranty: Refurbished / spare parts provided for 6-12 months warranty

Service: Module testing, parameter configuration, fault diagnosis, technical support