Woodward 5501-412 Digital Servo Amplifier

Parameter Name	Parameter Value
Product Model	Woodward 5501-412
Manufacturer	Woodward, Inc.
Product Type	Digital Servo Amplifier
Output Current	10A continuous / 20A peak (5 sec)
Input Voltage	24–80V DC (regulated)
Control Modes	Torque, Velocity, Position, Cyclic Synchronous
Communication	EtherCAT (CoE), CANopen
Feedback Support	EnDat 2.2, BiSS C, Sin/Cos (1Vpp), Analog ±10V
Safety Functions	STO (SIL 3/PL e), SS1
Switching Frequency	20 kHz (programmable)
Control Loop Update	≤50 μs
Operating Temp	-40°C to +85°C (derating >65°C)
Protection Class	IP66 (NEMA 4X)
Dimensions	150 x 110 x 45 mm
Certifications	UL 61800-5-1, CE, DNV-GL

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Description

Product Overview

The Woodward 5501-412 is a high-performance digital servo amplifier engineered for precision motion control in critical industrial applications. Part of Woodward’s 5500 series drive platform, this unit delivers 10A continuous current (20A peak) to control servo motors, hydraulic valves, and linear actuators with ±0.1% positioning accuracy. Designed for demanding environments, the 5501-412 integrates adaptive control algorithms, SIL 3 safety functions (Safe Torque Off/Safe Stop 1), and dual-port EtherCAT communication for real-time synchronization in multi-axis systems. Its rugged IP66-rated enclosure withstands extreme temperatures (-40°C to +85°C), vibration (10g RMS), and chemical exposure – making it ideal for turbine control, metal forming, and offshore applications where reliability is paramount.

Technical Specifications

Parameter Name	Parameter Value
Product Model	Woodward 5501-412
Manufacturer	Woodward, Inc.
Product Type	Digital Servo Amplifier
Output Current	10A continuous / 20A peak (5 sec)
Input Voltage	24–80V DC (regulated)
Control Modes	Torque, Velocity, Position, Cyclic Synchronous
Communication	EtherCAT (CoE), CANopen
Feedback Support	EnDat 2.2, BiSS C, Sin/Cos (1Vpp), Analog ±10V
Safety Functions	STO (SIL 3/PL e), SS1
Switching Frequency	20 kHz (programmable)
Control Loop Update	≤50 μs
Operating Temp	-40°C to +85°C (derating >65°C)
Protection Class	IP66 (NEMA 4X)
Dimensions	150 x 110 x 45 mm
Certifications	UL 61800-5-1, CE, DNV-GL

Key Features & Advantages

Adaptive Resonance Suppression

Auto-tuning algorithms dynamically dampen mechanical resonances up to 500 Hz, eliminating instability in long-stroke actuators and gantry systems.

Energy Recovery System

Regenerative braking feeds 92% of deceleration energy back to DC bus, reducing heatsink requirements by 40% versus conventional drives.

Military-Grade Robustness

MIL-STD-810H certified construction withstands salt fog (ASTM B117), explosive atmospheres (ATEX Zone 2), and shock loads up to 100g.

Deterministic EtherCAT

≤250 μs cycle times enable synchronized control of 32+ axes – critical for printing presses and electronic assembly.

Integrated Diagnostics

Real-time monitoring of MOSFET junction temps, current ripple, and motor phase imbalance enables predictive maintenance.

Application Areas

Gas Turbine Control: Fuel valve positioning with fail-safe shutdown
Hydraulic Presses: Force-controlled stamping with adaptive blank holder pressure
Steel Rolling Mills: Work roll gap adjustment with nanometer repeatability
Marine Thrusters: Azimuth control with DP3 dynamic positioning
Injection Molding: Screw position/velocity profiling
Test Rigs: Programmable load simulation for component validation