9905-972 Woodward 2301D Series Datasheet & Technical Manual

Availability: 10 left in stock

Woodward 9905-972 2301D Digital Control Series Configured for precise speed control and automatic load sharing in generator sets, the Woodward...

SKU: 9905-972

Manufacturer: Woodward
Product No.: 9905-972
Product Type: Digital Speed Controls
Product Origin: USA
Payment:T/T, Western Union
Weight: 2500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Woodward 9905-972 2301D Digital Control Series

Configured for precise speed control and automatic load sharing in generator sets, the Woodward 9905-972 (9905-972 Digital Load Sharing and Speed Control Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	9905-972
Brand	Woodward
Origin	United States
Weight	2.5 kg (Shipping Weight: 1.30 lbs baseline package variant)
Dimensions	300 mm x 200 mm x 80 mm
Operating Temp	-40 deg C to 70 deg C
Power Consumption	Determined by 18-32 VDC input tracking
Power Supply Input	18 to 32 VDC (Nominal 24 VDC engine battery compatible)
Speed Control Range	1 to 20,000 Hz frequency input range
Analog Configuration	6-channel analog input with 4-20 mA output
Feedback Interfaces	MPU (magnetic pickup), analog speed reference, discrete inputs
Actuator Command	Pulse-Width Modulation (PWM) or analog actuator drive
Serial Protocol	RS-485 Modbus RTU interface
Enclosure Rating	Rugged metal housing, panel-mounted configuration

Actuator Loop Feedback Response & Governor Regulation

The module functions as a core processing engine to execute digital speed regulation through a 1 to 20,000 Hz frequency signal fed directly from a magnetic pickup (MPU) sensor. The internal 2301D logic paths run discrete proportional, integral, and derivative (PID) algorithms to adjust for dynamic speed deviations, outputting either high-frequency PWM parameters or linear 4-20 mA current vectors to the throttle actuator.

This dedicated actuator loop feedback response architecture stabilizes prime movers against immediate kilowatt (kW) spikes. When running in multi-unit network grids, the module interacts with external Woodward DSLC units via dedicated analog channels, matching real-time load distribution profiles to preserve frequency synchronization across isolated or utility-tied generator buses.

Frequently Asked Questions

Q: Does the 9905-972 support live hot-swap wire extraction while the generator fuel loop is active? A: No. Removing the terminal links or cutting the 18-32 VDC supply path under load will drop the actuator drive current instantly. This drops the governor throttle positioning loop, triggering an immediate uncommanded engine shutdown or overspeed trip.

Q: How does the unit process an sudden loss of the primary magnetic pickup speed reference? A: The module executes integrated sensor tracking validation. If the magnetic pickup frequency drops below the 1 Hz operational threshold while the run confirmation state is logic high, the module flags an MPU failure alarm and sets the actuator output current to zero to isolate the fuel feed.

Q: Can the 6-channel analog inputs on this module register multi-mode current and voltage signals? A: Yes. The 6-channel analog input matrix is configurable via the local interface or PC software tool, mapping various field sensors alongside standard 4-20 mA output lines to drive downstream governor sub-systems.

Field Installation Guidelines

Chassis Thermal Dissipation: Secure the panel-mounted metal housing to a flat, unpainted mounting surface inside the main control enclosure. Ensure surrounding layout limits are kept clear to allow passive vertical air convention through the integrated chassis heat sinks.
Magnetic Pickup (MPU) Shield Integrity: Always route the high-frequency MPU sensor circuit using specialized twisted-pair shielded cable. Terminate the drain shield solely at the designated control grounding terminal, ensuring it remains isolated at the engine casing to eliminate noise induction.
Signal Line Routing Separation: Maintain distinct structural separation between the low-voltage 4-20 mA actuator drive runs and the primary high-current generator output lines. Use grounded steel conduits for signal runs to protect the internal 2301D digital logic core from high-frequency electromagnetic fields.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.