WOODWARD 5439-273 Product Detailed Description

Product Model: WOODWARD 5439-273

Brand: WOODWARD (Woodward)

Product Type: 505 Series Digital Speed Controller / Control Module

Generation Time: 2026-05-18 10:40:02

I. Product Overview

WOODWARD 5439-273 is a 505 Series digital speed controller based on high-performance microprocessor, designed specifically for single/double actuator steam turbines and generator sets. It integrates advanced control algorithms and can achieve high-precision closed-loop control of speed and load, and has complex functions such as automatic avoidance of critical speeds and valve position management. It is widely used in industrial steam turbines, power turbines, compressor drives and other key power control scenarios.

II. Core Functional Characteristics

Dual Mode Control: Supports no-difference speed regulation (equal-time mode) and differential speed regulation (load distribution), suitable for single units or grid-connected operation.

Programmable Configuration: Through the front panel or software for full parameter programming, supports custom control logic.

Multi-Signal Compatibility: Receives 4-20mA or 1-5VDC remote speed/load setting signals.

Critical Speed Avoidance: Built-in program can automatically quickly pass through dangerous resonance speed zones, protecting shaft safety.

Dual Actuator Control: Specifically designed for single/double valve steam turbines, precisely controls main steam valve / regulating valve opening.

Comprehensive Protection: Over-speed, under-speed, over-current, over-voltage, sensor failure multiple protection and alarm.

Self-Diagnosis Function: Real-time monitoring of system status, with fault recording and diagnostic capabilities.

Communication Linkage: Supports RS-232, Ethernet and Modbus protocols, can be connected to DCS/PLC systems.

III. Technical Specifications Parameters

1. Electrical Parameters

Control Core: 32-bit digital microprocessor

Power Supply Voltage: 24 VDC (±10%)

Power Consumption: ≤ 10W

Analog Input: 6 channels × 4-20mA (programmable)

Digital Input: 16 channels × dry contacts (4 fixed, 12 programmable)

Analog Output: 0-10 VDC (drives actuators)

Control Accuracy: ±0.01% speed accuracy

Isolation Voltage: 1500 VDC

2. Physical and Environmental

Size: 152 × 51 × 203 mm

Weight: Approximately 0.7 kg

Operating Temperature: -10°C ~ +60°C

Storage Temperature: -40°C ~ +85°C

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

Protection: Industrial-grade three-proof coating

Installation: Standard rack / panel installation

3. Certification and Status

Certification: CE, UL, CSA

Product Status:停产 (spare parts supply only)

Alternative Models： 505E (9907-157)， 505H Series

IV. Typical Application Scenarios

Industrial Steam Turbines： Speed control for pumps， fans， compressors

Power Turbines： Speed and load control for turbine generator sets

Combined Heat and Power Units： Island / grid-connected mode switching and stable control

Petrochemical / Metallurgy： Safe start-stop and speed control of turbine compressors

Marine Steam Turbines： Speed control and protection for main propulsion systems

V. Model Association and Alternatives

Same Series Controllers

5439-273： 505 Standard Steam Turbine Controller

9907-157： 505E Enhanced Controller (alternative)

9907-164： 505H High Temperature Controller

5439-927： 505 Extended Function Controller

Compatible Systems： Woodward I/H Electro-hydraulic Converter， Hydraulic Actuators

VI. Quality and Service

Origin: USA (Original Factory of WOODWARD)

Warranty: 12 months

Service: Provide control schemes, parameter configurations, on-site debugging, spare parts supply