Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Numbers | 8402-319, 8402-119 |
| Product Type | Digital speed-governing controller |
| Series | Woodward 8402 family |
| Typical Application | Turbine, generator, or engine speed control |
| Function | Speed/load regulation, governor control |
| System Fit | Woodward turbine/engine control systems |
| Availability | Surplus / refurbished / new old stock |
| OEM Documentation | Confirm against Woodward manual or nameplate |
| Drop-in Replacement | Not guaranteed; verify revision, firmware, and I/O map |
Product Introduction
Woodward 8402-319 and 8402-119 are listed as digital speed-governing controllers within the Woodward 8402 family. In practice, they appear in surplus catalogs as governor or speed-control modules used with turbine, generator, or prime-mover systems. They are not general-purpose PLC I/O cards; they belong to Woodward’s energy-control ecosystem, where speed regulation, actuator drive, and protection logic matter more than raw I/O count.
Because public documentation is limited, treat these as legacy spares. The 8402-271 is another known member of the 8402 series, and some suppliers reference 8402-119 and 8402-319 as related 8402-series governor modules. However, that does not prove identical electrical ratings. Always verify the nameplate, revision, and compatible controller family before substitution.
WOODWARD 8402-319 8402-119
QA/QC Transparency SOP
- Intake & Origin Verification: Confirm part number 8402-319 or 8402-119, revision, serial number, and Woodward branding. Check for burnt components, corroded connectors, or damaged terminal blocks.
- Live Functional Testing: Power the module per Woodward wiring requirements. Verify boot sequence, LED status, and communication with the associated governor or turbine controller.
- Electrical Parameter Tests: Measure supply voltage, output drive signals, and insulation resistance. Confirm actuator interface behavior matches the original module.
- Firmware/Config Verification: Read firmware version, configuration parameters, and calibration data. Back up settings before returning the module to service.
- Final QC & Anti-Static Packaging: Label with part number, revision, test date, and pass/fail status. Pack in anti-static bags with connector protection and rigid outer packaging.
Field Engineer Gotchas
- Do not treat these as generic PLC modules. They are Woodward governor/speed-control devices. Swapping them into a non-Woodward system without matching the actuator and sensor interface will not work.
- 8402-319 vs 8402-119 may not be interchangeable. They share the 8402 series, but revision, I/O mapping, firmware, or actuator calibration can differ.
- Firmware and calibration matter. A governor module may physically fit but still fail to control speed correctly if parameters are mismatched.
- Verify the actuator interface. Woodward governors often drive electrohydraulic actuators, current-pressure converters, or servo valves. Wrong output type can cause unstable speed control.
- Surplus listings are vague. Many sellers label these simply as “speed controller” without verified specs. Require photos of the nameplate and a functional test report.
WOODWARD 8402-319 8402-119
Application Scenarios
- Steam turbine governor replacement. Restores speed control on a legacy turbine package running Woodward 8402-series hardware.
- Gas generator set maintenance. Used as a spare governor module where the original 8402-series controller has failed.
- Industrial expander or compressor control. Supports speed regulation in process trains that rely on Woodward electronic governing.
- Brownfield power plant spare pool. Keeps critical turbine controls available while OEM lead times or migration projects are pending.
Case note: A plant maintenance team sourced a “Woodward 8402” module from surplus stock without confirming whether it was 8402-319 or 8402-119. The unit powered up, but the actuator output range did not match the existing calibration. After comparing nameplate data and reloading the correct parameters, the governor returned to stable operation. The lesson: governor modules are not plug-and-play without parameter verification.
FAQ
Are 8402-319 and 8402-119 the same part?
Not necessarily. They belong to the same 8402 series, but revision, firmware, or interface details may differ. Verify against the Woodward nameplate and system manual.
What does this module control?
It is used for electronic speed governing, typically in turbine, generator, or engine applications.
Can I replace it with another 8402 module?
Only after confirming compatibility. Even within the 8402 family, actuator interface and calibration may not match.
Is this still available new from Woodward?
Treat availability as legacy/surplus unless confirmed by an authorized Woodward distributor. Many market units are refurbished or new old stock.
Can I use it in a generic PLC rack?
No. This is a Woodward governor controller, not a standard PLC I/O module.
What information should I send a supplier?
Provide the full part number, revision, serial number, photos of the nameplate, and the turbine or generator model it controls.
