Product Description: Woodward 5462-443 Electro-hydraulic Amplifier

Product Model: 5462-443

Brand: Woodward

Product Series: 500 Series

Product Type: Electro-hydraulic Signal Amplifier / Servo Control Module

I. Product Overview

The Woodward 5462-443 is a high-performance electro-hydraulic servo amplifier specifically designed for industrial control systems. It is used to linearly amplify weak electrical signals (such as 4-20mA, PWM) from the controller into large power hydraulic drive signals, precisely controlling the opening and position of electro-hydraulic actuators (servo valves, proportional valves). It is a key interface module connecting the electronic control system with the hydraulic actuator.

Core Functions: Electrical - Hydraulic Signal Conversion, Power Amplification, Servo Closed-loop Control, Signal Isolation

Applicable Objects: Electro-hydraulic Speed Control / Positioning Systems for Turbines, Gas Turbines, Engines, Compressors

Product Form: Modular Rail Installation, Industrial Grade Protection Design 

II. Core Technical Parameters

1. Electrical Specifications

Power Supply: 24 VDC (18–32 VDC)

Input Signal: 4–20 mA / 0–10 VDC / PWM Differential Signal

Output Drive: Dual-channel Proportional Servo Valve Drive (±10V / 0–1A)

Feedback Input: LVDT / RVDT Position Feedback Signal (0–10V)

Isolation Protection: Input / Output / Power Three-terminal Electrical Isolation (2500Vrms)

Safety Level: Overcurrent, Short Circuit, Reverse Connection, Overtemperature Automatic Protection

2. Mechanical and Environmental

Operating Temperature: -40°C ～ +85°C

Protection Grade: IP20 (Standard)

Installation Method: Standard 35mm DIN Rail

Weight: Approximately 0.6 kg

Size: Approximately 110mm × 75mm × 55mm

3. Control Performance

Linearity: ≤ ±0.1% F.S.

Response Time: ≤ 2 ms

Bandwidth: 0–100 Hz

Gain Adjustment: 0.1–10 Times Continuous Adjustable

Zero Drift: ≤ ±0.05% F.S./°C

Control Modes: Open Loop / Closed Loop (Position / Force) Dual Mode

III. Main Functional Characteristics

High Precision Electro-hydraulic Conversion

Utilizing 32-bit High-Speed DSP and Low Drift Operational Amplifiers to achieve distortion-free linear conversion from electrical signals to hydraulic power.

Supports Position Closed Loop (LVDT/RVDT) and Force Closed Loop Dual Modes, suitable for various electro-hydraulic actuators.

Built-in Adaptive PID Algorithm, dynamically optimizes control response, eliminates oscillations and overshoots.

Comprehensive Signal Protection

Three-terminal Full Electrical Isolation (2500Vrms), completely blocks ground loop, highly resistant to industrial electromagnetic interference (EMI).

Input Signal Multi-level Filtering, suppresses noise, ensures control stability.

Output End Short Circuit / Overcurrent / Overtemperature Hardware Protection, automatically limits current and shuts off, protecting servo valves and modules.

Flexible Adaptation and Usability

Compatible with Woodward 500/505/2301 Series and all standard 4–20mA/PWM controllers.

Front Panel Potentiometer: Zero Position, Gain, Slope, Dead Zone On-site Quick Calibration.

Status LED Indicator Lights: Power, Operation, Fault, Signal Overlimit Real-time Diagnosis.

Industrial Grade High Reliability Design

Wide Temperature, High Resistance, Long-life Military-grade Components, suitable for power plants, petrochemicals, offshore platforms, etc. harsh working conditions.

No Fan, No Contact Design, MTBF > 500,000 Hours.

Plug and Play, Maintenance-Free, Supports Hot Swap Replacement.

IV. Typical Application Scenarios

Steam Turbine Control System: 505/505E Controller → 5462-443 → Electro-hydraulic Actuator (Servo Valve)

Engine Speed Regulation System: 2301D Controller → Electro-hydraulic Amplifier → Fuel Actuator

Industrial Compressor: DCS/PLC 4–20mA Signal → Electro-hydraulic Servo Control

Hydro Turbine / Gas Turbine: Position Closed Loop Control, Guide Vanes / Fuel Valve Precise Positioning

Hydraulic Test Bench: High Precision Pressure, Flow, Position Electro-hydraulic Control

V. Product Advantages

Control Precise: Millisecond-level response, 0.1% grade linearity, achieving micrometer-level positioning of hydraulic systems.

Stable and Reliable: Full Isolation + Multi-level Protection, zero faults in industrial environment for long-term operation.

Universal Compatibility: Standard Signal Interfaces, compatible with all mainstream electronic control and hydraulic systems.

Easy Debugging: Panel Calibration + LED Diagnosis, 10-minute rapid startup on-site.

Sturdy and Durable: Rail-mounted Modular Design, Anti-vibration, Dustproof, Lifetime Maintenance-Free.

V. Model Code Interpretation

5462: Woodward 500 Series Control Module Base Number 443: Special model for electro-hydraulic amplifier (24VDC, dual-channel servo drive, LVDT feedback, fully isolated, wide temperature range)

VII. Standard Packaging List

5462-443 Electro-hydraulic Amplifier Module 1 piece

DIN rail mounting clip

Product certificate and warranty card

Terminal blocks and labels