Description
Product Overview
9906-619 is the low-voltage hardware unit of Woodward 723PLUS Digital Speed & Load Sharing Controller. This is bare controller hardware without preloaded application firmware, supporting configuration for steam turbines, gas engines and generator paralleling systems.
Distinction of model variants:
- 9906-619: Low voltage version (18–40 VDC power supply)
- 9906-620: High voltage AC variant
- 9906-700: Low voltage with built-in actuator filtering circuit
It receives speed feedback from magnetic pickup sensors (MPU) or proximity probes, executes closed-loop speed regulation, droop control and multi-unit load sharing. It can cooperate with DSLC synchronizer to realize generator synchronization and parallel operation. Widely used for turbine and generator set control in power plants, industrial energy stations and marine power systems.
9906-619
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 9906-619 |
| Module Type | 723PLUS Digital Control Low-Voltage Hardware |
| Manufacturer | Woodward |
| Power Supply | 18–40 VDC (nominal 24/32 VDC) |
| Speed Sensor Input | Magnetic pickup (MPU), proximity switch |
| Analog I/O | Multiple configurable 4–20mA / ±10V analog channels |
| Discrete I/O | Relay contact inputs and outputs for interlock & trip logic |
| Communication Interfaces | RS232, RS485 (Modbus), Hand-Held Programmer port |
| Core Functions | Speed governing, isochronous/droop mode, load sharing, soft loading, overspeed protection logic |
| Mounting Method | Cabinet panel mounting |
| Operating Temperature | -40℃ ~ +70℃ |
| Ambient Humidity | 5%–95% non-condensing, non-condensing |
| Protection Class | IP20 (must be installed inside control cabinet) |
| Programming Tool | Woodward 723PLUS configuration software / handheld programmer |
| Hot Swap | Not supported; power down before replacement |
| Spare Part Status | OEM production discontinued; new surplus and refurbished units available |
Key Features
- Supports isochronous constant speed and droop mode, suitable for isolated operation and grid-parallel generator units
- Built-in load sharing algorithm to realize stable power distribution among multiple parallel gensets
- Rich configurable analog and discrete I/O to connect actuators, transmitters and safety interlock circuits
- Compatible with DSLC digital synchronizer to complete automatic synchronization and paralleling control
- Comprehensive hardware self-diagnosis, monitors power supply, sensor circuit and internal hardware status
- Multiple communication interfaces support remote data monitoring and parameter modification via DCS/SCADA
- Robust metal chassis with anti-vibration design, stable long-term operation in turbine and engine cabinet environments
- Important note: Hardware alone cannot run normally; corresponding application firmware must be downloaded on-site
- Different part number revisions (619 / 620 /700) cannot be directly interchanged without matching power supply and firmware
Application Scope
Steam turbine & gas engine governor control systems, combined cycle power plant auxiliary generator panels, industrial waste heat unit automation cabinets, marine genset parallel control, distributed power station load sharing systems, and maintenance & retrofit projects of legacy Woodward 723PLUS control equipment.
