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5403-535

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5403-535
May 18, 2026

5403-535

WOODWARD 5403-535 is a 505 series digital turbine controller specially designed for single and dual actuator steam turbines, which realizes high-precision speed regulation, load control and valve position adjustment functions. It is equipped with rich configurable analog and discrete input and output interfaces, supports multiple communication protocols, features complete fault diagnosis and overspeed protection functions, adopts industrial grade design with stable and reliable performance, and is widely used in power generation, petrochemical industry and other fields for various steam turbine unit automatic control and safe operation monitoring.

Description

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WOODWARD 5403‑535

505 Digital Microprocessor Controller

For Single / Dual‑Actuator Steam Turbines

Datasheet & Operation Manual (English)

1. General Description

WOODWARD 5403‑535 is a 505‑series microprocessor‑based digital controller designed for speed, load, and turbine governor control of single or dual‑actuator steam turbines. It integrates high‑precision regulation, configurable I/O, and communication functions, widely used in power generation, compressor drives, and industrial turbine applications.

2. Key Features

  • Precision speed control: ±0.01% accuracy, 1 ms loop update

  • Dual‑mode operation: Programming Mode / Run Mode

  • Actuator drive: Directly controls electro‑hydraulic (I/H) converters & steam valves

  • Configurable I/O: Analog (4–20 mA / 1–5 Vdc), discrete inputs/outputs

  • Communication: Modbus RTU/TCP, CAN (J1939/CANopen), RS‑232

  • Fault diagnostics: Overspeed, overvoltage, short circuit, open load detection

  • Redundancy support: Hot‑swap, backup configuration, fail‑safe output

  • Industrial grade: –40 °C to +70 °C, conformal coated, shock/vibration resistant

3. Technical Specifications

  • Part Number: 5403‑535

  • System: Woodward 505 Digital Governor Platform

  • Processor: 32‑bit microcontroller, triple‑redundant monitoring

  • Power Supply: 24 VDC ±10%, 15 W max

  • Analog Inputs: 4–20 mA / 1–5 Vdc (speed, load, setpoint)

  • Analog Outputs: 4–20 mA (valve position, speed, load)

  • Discrete I/O: 8×DI / 8×DO (24 VDC, isolated)

  • Communication Ports:

    • 1×RS‑232 (local service)

    • 1×CAN (J1939 / CANopen selectable)

    • 1×Ethernet (Modbus TCP, optional)

  • Memory: 128 MB Flash (program/logs), 64 MB SDRAM

  • Enclosure: Panel‑mount, aluminum alloy, IP20

  • Dimensions (W×H×D): 200 × 150 × 50 mm

  • Weight: 1.2 kg

4. Functional Overview

  • Speed Control: Isochronous (constant speed) / droop (load sharing) modes

  • Load Control: Base load, peak load, and import/export regulation

  • Overspeed Protection: 2oo3 voting, independent trip output, configurable setpoints

  • Valve Position Control: Linear / non‑linear actuator curves, 5‑point user definition

  • Event Logging: 1 ms resolution SOE, fault history, 10‑year non‑volatile storage

5. Operating Modes

  1. Programming Mode: Configure parameters, I/O mapping, control logic, and communication via Woodward Service Tool (PC software).

  2. Run Mode: Execute closed‑loop speed/load control, monitor I/O, and communicate with DCS/SCADA.

6. Safety & Approvals

  • Certifications: CE, RoHS, UL, CSA, ATEX (Zone 2)

  • Safety Integrity: SIL 2 capable (per IEC 61508)

  • Fail‑Safe Design: Outputs de‑energize on fault; independent overspeed trip

7. Applications

  • Steam turbine speed/load control (single/dual actuator)

  • Turbine‑driven compressors & generators

  • Combined‑cycle power plants

  • Industrial process turbines (refinery, petrochemical)

8. Compatibility

  • Actuators: Woodward I/H converters, electro‑hydraulic valves, proportional actuators

  • Software: Woodward Service Tool v4.0+ (configuration & monitoring)

  • Replacement for: Legacy 505/505E controllers (5403‑5xx series)


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