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3. Key Technical Specifications
| Parameter | Specification Value |
| Manufacturer | Woodward |
| Part Number | 9907-1199 |
| Control Series | 2301E Digital Load Sharing & Speed Control |
| Input Voltage | 18–40 VDC (24 VDC nominal) |
| Power Consumption | 15 W maximum |
| Speed Inputs | 2 Magnetic Pickup Units (MPU) or proximity switches |
| Control Modes | Isochronous, Droop, Process Control, Load Sharing |
| Actuator Driver Outputs | 2 configurable output drivers (0–200 mA, 4–20 mA) |
| Communication Interface | RS-232, RS-422, or RS-485 Modbus RTU serial ports |
| Operating Temperature | −40°C to +70°C (−40°F to +158°F) |
| Configuration Tool | Woodward Control Assistant / Watch Window software |
4. Product Introduction & Supply Chain Strategy
The Woodward 9907-1199 is a 2301E digital speed control module engineered to govern speed and load sharing for steam turbines, gas turbines, and industrial engines. Replacing older analog 2301A units, the 2301E platform introduces microprocessor-based digital processing, software-programmable control curves, dual MPU inputs, and Modbus communications for real-time telemetry into DCS and SCADA networks.
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Maintaining a New Surplus 9907-1199 on-site ensures rapid restoration of power generation assets without incurring multi-week OEM delivery delays. Refurbished digital controllers often harbor hidden flash memory degradation, damaged RS-485 transceiver chips, or micro-cracks in multi-layer PCB traces. Sourcing genuine New Surplus hardware guarantees fresh memory integrity, zero backplane wear, and reliable digital loop execution.
9907-1199
9907-1199
5. Installation & Configuration Guide
1.Pre-Installation Preparation & Safety:Enforce LOTO on starter and supply power; backup software file.
Implement full Lockout/Tagout (LOTO) on the engine starter circuit and 24 VDC control power rail. Connect a PC running Woodward Control Assistant to the existing 9907-1199 unit via RS-232/USB serial cable and upload a backup of the current application configuration (.sid file). Wear an ESD-grounded wrist strap.
2.Legacy Unit Removal:Label wiring harness and unbolt digital controller chassis.
Systematically label and unplug the removable terminal blocks containing MPU inputs, actuator drive cables, serial communication lines, and 24 VDC supply power. Remove the panel mounting screws and extract the old chassis.
3.Mechanical Mounting & Hardware Connection:Mount module, terminate wiring, and connect PC serial cable.
Mount the new 9907-1199 chassis onto the enclosure backplate. Re-insert the wired terminal blocks securely into their corresponding pin headers. Connect the serial interface cable between the module’s diagnostic port and your configuration laptop.
4.Software Flash & Dynamic Commissioning:Download .sid file, verify MPU frequency, and start engine.
Energize the 24 VDC power rail. Download the saved configuration file (.sid) into the new 9907-1199 using Woodward Control Assistant. Crank the prime mover to verify dual MPU signal levels in the diagnostic software window, then start the engine and monitor dynamic speed response under step loads.
6. Firmware/Software Versions & Upgrade Notes
- Configuration Software: Configured exclusively using Woodward Control Assistant or Watch Window software suites over serial communication ports.
- File Transfer Requirement: Digital 2301E units require parameter file loading before operation; installing a blank unit out of the box without loading your plant’s specific application settings (.sid file) will cause engine start failure or immediate shutdown trips.
- Analog-to-Digital Retrofits: When replacing legacy analog 2301A models (e.g., 9907-018) with the digital 2301E (9907-1199), terminal pin layouts differ completely—verify wiring diagrams prior to applying power.
7. Frequently Asked Questions (FAQ)
Q: Is this Woodward 9907-1199 digital unit Brand New Surplus or refurbished?
A: This module is 100% Brand New Surplus stock. It has never seen active field operation, features clean connection pins, and is preserved in protective anti-static packaging.
Q: Why choose New Surplus over a refurbished digital 2301E controller?
A: Microprocessor-based digital controls rely on uncompromised onboard flash memory, power regulation chips, and digital-to-analog output converters. Refurbished units may look clean externally, but worn power circuitry or degraded EEPROM chips can cause sudden CPU resets or loss of actuator drive signals during operation. Buying New Surplus ensures full original hardware life and operational security.
Q: Does the 9907-1199 come pre-programmed for my engine?
A: No. As a programmable digital controller, it must be loaded with your specific engine/turbine configuration file (.sid) via Woodward Control Assistant prior to engine startup.
Q: Can the 9907-205 or older 2301A analog modules be directly swapped with the 9907-1199?
A: The 9907-1199 serves as a digital upgrade for legacy 2301A speed controls, but it requires wiring adjustments due to different terminal layouts and requires software parameter calibration instead of adjusting physical potentiometers.
Q: What warranty is supplied with this New Surplus Woodward unit?
A: This Woodward 9907-1199 speed control module comes with a full 1-year replacement warranty protecting against hardware defects and component failures.
