Product Description: Woodward 5462-268 Digital Speed Controller (505 Series)

Product Model: 5462-268

Brand: Woodward

Product Series: 500 Series / 505 Digital Controller

Product Type: Turbine / Engine Digital Speed Controller (CPU Board / Core Control Module)

I. Product Overview

The Woodward 5462-268 is the core motherboard (Mother Board) of the 505/505E digital speed controller, which is a microprocessor control unit specifically designed for industrial steam turbines, gas turbines, and engines. It integrates high-precision speed regulation, overspeed protection, remote communication, and system diagnosis functions, and is the core control component of turbine drives, power generation, and mechanical transmission systems.

Core Functions: Closed-loop speed control, overspeed protection, load control, signal processing, communication, and diagnosis

Applicable Objects: Steam turbines, gas turbines, industrial engines, power generation units

Product Form: Modular circuit board, standard rack installation 

II. Core Technical Parameters

1. Electrical Specifications

Power Supply: 24 VDC (18–32 VDC)

Speed Input: Dual redundant MPU electromagnetic sensors (differential input)

Analog I/O: 4–20 mA / 1–5 VDC standard signals

Control Output: Low current PWM signal (for driving electro-hydraulic actuators)

Communication Interface: Dual independent serial ports (RS-232 + RS-422), supporting Modbus RTU protocol

Safety Level: Hardware independent overspeed protection (Overspeed Test)

2. Mechanical and Environmental

Operating Temperature: -40°C ～ +85°C

Protection Grade: IP20 (for cabinet installation)

Installation Method: 19-inch standard rack

Weight: Approximately 0.80 kg

Size: Approximately 160mm × 160mm × 120mm

Certifications: UL, CE, Class I, Div. 2 Hazardous Area Certification

3. Control Performance

Control Mode: Speed control, load control, automatic avoidance of critical speed

Speed Regulation Accuracy: ≤ ±0.02%

Control Cycle: Microsecond-level high-speed closed-loop calculation

Protection Functions: Multiple levels of overspeed protection (103% / 110% rated speed), sensor failure, actuator failure, power loss protection

III. Main Functional Characteristics

High Precision Speed Control

32-bit microprocessor closed-loop PID algorithm, supporting ** Isochronous / Droop ** dual modes.

Single machine constant speed or multi-machine parallel load distribution, suitable for isolated power grids and grid-connected conditions.

Automatic critical speed avoidance, protecting the shaft system safety.

Hardware-level Safety Protection

Independent hardware overspeed protection circuit, not dependent on software, response time < 10ms.

Full signal electrical isolation, resistant to industrial electromagnetic interference (EMI/RFI).

Power reverse connection, overcurrent, short circuit comprehensive protection.

Powerful Communication and Diagnosis

Dual serial ports (RS-232/422) + Modbus, seamless integration into DCS/PLC/SCADA.

Real-time self-diagnosis, status monitoring, historical event recording.

Support for remote parameter configuration, software upgrade, program backup / restoration.

Industrial-grade reliable design

Wide temperature range, high vibration resistance, long-life components, suitable for harsh environments such as power plants, petrochemicals, and offshore platforms.

Plug-and-play, compatible with Woodward 505/505E full series and electro-hydraulic actuators.

Multi-level password protection to prevent unauthorized parameter modification.

IV. Typical Application Scenarios

Industrial Steam Turbine Control: Driving compressors, pumps, fans, turbine expanders

Power / Heat Power Generation: Speed regulation, grid connection, load control of steam turbine generators

Mechanical Drive System: Precise speed control of engine / gas turbine drive equipment

Emergency / Standby Power: Automatic speed regulation and protection of diesel / gas generator sets

Renovation of Old Units: Replacement of traditional mechanical / hydraulic speed regulators to achieve digital upgrade

V. Product Advantages

Core Control: Original factory core motherboard of 505 controller, with the best performance and compatibility.

Precise and Stable: Speed regulation accuracy of 0.0001 level, microsecond-level control cycle.

Safety First: Hardware-level overspeed protection, in line with the highest industrial safety standards.

High Integration: Integrated functions of speed regulation + protection + communication + diagnosis.

Easy Integration and Maintenance: Standard interfaces + full-function diagnosis, convenient system integration and maintenance.

VI. Model Code Interpretation

5462: Base series number of Woodward 500 controller

268: Hardware version of 505 controller motherboard (24VDC, dual serial ports, PWM output, wide temperature range, hazardous area certification)

VII. Standard Packaging List

5462-268 Controller Mainboard 1 piece

Installation screws and fixing brackets

Product certificate and warranty card

Download authorization for configuration software (ToolKit)