Woodward 9905-211 Digital Speed Control

The Woodward 9905-211 is a digital speed control and synchronization module designed for steam turbines, gas turbines, and diesel engine-driven generators. It offers precise speed regulation, load sharing, and automatic synchronization for industrial power generation systems. Part of Woodward’s 2301A series, it is renowned for its reliability in demanding environments.

Specifications

• Model: 9905-211

• Power Supply: 24 VDC input

• Rated Class: Class 1, Division 2 (hazardous location compliant)

• Communication Ports:

• RS-232 and RS-422 serial interfaces

• Optional Modbus® serial communication

• Output Type: Low-current PWM output

• Mounting: Panel-mounted with standard dimensions

• Environmental Tolerance: Industrial-grade temperature and vibration resistant

• Redundancy: Built-in Ethernet redundancy via SFP+ 10G ports

Features

• Automatic Synchronization:
  Matches frequency, phase, and voltage using analog or discrete bias signals

• Adaptive Speed Sensing:
  Intelligent algorithm for dynamic speed reference adjustment

• Load Sharing & Transfer:

• Soft load transfer

• Load rejection and pulse handling

• Remote speed/load reference

• Idle Management:

• Auto idle-to-rated transition

• Idle drop functionality

• Torque & MAP Limiting:
  Built-in torque and manifold air pressure limiters

• Data Logging:
  Internal data recording for diagnostics and performance tracking

• Application Versatility:

• Supports diesel, gas, and dual-fuel engines

• Compatible with compressors, expanders, and turbine systems

• Ideal for generator synchronization and load control