WOODWARD 5439-986 Product Detailed Description

Product Model: WOODWARD 5439-986

Brand: WOODWARD (Woodward)

Product Type: NetCon 5000 / MicroNet Series High-Performance Digital Speed Controller / 505 Type Controller

Generation Time: 2026-05-18 11:08:53

I. Product Overview

WOODWARD 5439-986 is a specialized, highly integrated digital speed / load controller. Its core is the standard hardware unit of the 505 series steam turbine control system. It is specifically designed for single / double actuator steam turbines, integrating speed regulation, load control, synchronous grid connection, and electro-hydraulic drive. It provides an independent and complete turbine control solution and is widely used in industrial power generation, pump / compressor driving, and other scenarios. 

II. Core Functional Characteristics

505 Standard Control Logic: Built-in Woodward's classic 505 control algorithm, supporting **uncontrolled speed (constant speed) and controlled speed (load distribution)** dual modes.

Independent Closed-loop Control: No need for an external CPU, single machine can achieve full closed-loop regulation of speed/load, control cycle ≤ 10ms.

Dual Actuator Drive: Supports dual-channel servo output, synchronous control of main steam valve / regulating valve dual actuators.

Multi-signal Compatibility: Compatible with magnetic resistance (MPU), pulse, analog quantity (4-20mA/1-5VDC) and other types of signals.

Electro-hydraulic Direct Drive: Directly outputs 0-250mA servo current, driving various electro-hydraulic actuators and servo valves.

Synchronous Grid Connection Control: Built-in synchronization, governor, load distribution functions, supporting single-machine / parallel machine power generation operation.

Multiple Protection Levels: Over-speed, over-current, short circuit, sensor failure, power loss, over-speed protection all functions.

Field Programming: Supports panel buttons / software configuration, parameter setting, curve setting, protection threshold configuration.

Hot Swap Design: Supports online maintenance, safe insertion and removal during system operation.

Industrial Grade Reliability: -40°C ~ +85°C wide temperature range, strong anti-vibration and anti-interference, suitable for extreme industrial environments.

III. Technical Specifications

1. Electrical Parameters

Power Supply: 24 VDC ±10%, power consumption ≤ 20W

Speed Input: 2 channels differential magnetic resistance sensors (MPU), 1Hz ~ 100kHz

Analog Input: 4 channels 4-20mA / 1-5VDC (16 bits, ±0.02% accuracy)

Control Output: 2 channels 0-250mA (servo valve drive, dual actuators)

Digital I/O: 8 channels DI (24VDC), 6 channels DO (relay / transistor)

Communication Interface: RS-485 (Modbus RTU)

Control Cycle: 10ms

Speed Accuracy: ±1rpm

Isolation: Input / Output / Power three-terminal electrical isolation (2500V AC)

2. Physical and Environmental

Size (W×H×D): 229 mm × 178 mm × 45 mm

Weight: Approximately 0.85 ~ 1.0 kg

Installation: Standard NetCon/MicroNet rack

Operating Temperature: -40°C ~ +85°C

Storage Temperature: -55°C ~ +90°C

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

Vibration: Complies with IEC 60068-2-6

Protection: IP20

3. Certification and Status

Certification: CE, UL, ATEX

Product Status: Active (In Service)

Replacement / Associated Models: 5439-984 (Multi-function Controller), 5439-966 (Electro-hydraulic Converter)

IV. Typical Application Scenarios

Industrial Steam Turbine Control: Single / Dual-valve steam turbine independent 505 speed regulation, load control.

Power Generation System: Steam turbine generator constant speed, synchronous grid connection, load distribution, island / grid operation.

Mechanical Drive: Steam turbine drive pump, compressor, fan speed / pressure closed-loop control.

Petrochemical: Refining unit steam turbine, process turbine unit main controller.

Electric Energy: Self-owned power plants, waste heat power generation, biomass power generation turbine control system.

Ship Power: Ship steam turbine main propulsion speed control system.

V. System Configuration and Compatibility

1. Supporting Modules

Power Module: 5439-766 (Main Power Supply), 5439-929 (High Voltage Power Supply)

Rack: 5439-861 (12-slot standard rack) I/O Expansion: 5437-xxx Series Analog/Digital I/O Modules

2. Compatible Systems

NetCon 5000 / MicroNet Full Series Control Systems

WOODWARD 505 / 505E Standard Steam Turbine Control System

Third-party DCS/PLC Systems (via Modbus RTU)

VI. Quality and Service

Origin: USA (WOODWARD Original Factory)

Warranty: 12 Months

Service: Parameter Adjustment, System Debugging, Fault Diagnosis, Technical Training