Description
Product Overview
505XT (Part No. 8200-1312) is a ruggedized digital turbine controller manufactured by Woodward. It is designed for single valve, single extraction or single admission industrial steam turbines and turbo-expanders.
This unit executes turbine start-up, speed governing, load control, extraction pressure regulation and safety protection logic. It accepts speed signals from MPU probes and outputs drive commands to steam control valves. The 8200-1312 variant supports 18–36 VDC power input and is certified for Class I Div.2 / ATEX Zone 2 hazardous locations, widely used in power generation, petrochemical and offshore turbomachinery control.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 505XT, 8200-1312 |
| Module Type | Digital Turbine Controller |
| Manufacturer | Woodward |
| Input Power | 18–36 VDC (LVDC hazardous area version) |
| Speed Input | 2 channels (passive MPU / active proximity probe, 0.5–32000 Hz) |
| Analog Inputs | 8 × 4–20mA configurable channels |
| Analog Outputs | 6 × 4–20mA, 2 actuator control outputs (4–20mA / 20–200mA selectable) |
| Digital Inputs | 20 configurable binary contact inputs |
| Relay Outputs | 8 Form-C relay outputs |
| Communication Interfaces | Dual Ethernet (Modbus TCP), RS232/485 serial ports, LinkNet-HT I/O expansion port |
| Supported Protocols | Modbus TCP, Modbus RTU, Woodward proprietary protocol |
| Front Panel | Built-in LCD display, membrane keypad, local operation switches |
| Protection Grade | Front panel IP54, rear housing IP20 |
| Hazardous Certification | IECEx, ATEX, Class I Division 2 Groups A,B,C,D |
| Operating Temperature | -40 ℃ ~ +70 ℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Engineering Software | Woodward Watch Window |
| Spare Part Status | OEM production discontinued; surplus new and refurbished units available |
505XT
Key Features
- Specialized control algorithm for extraction/admission steam turbines with ratio-limiter decoupling function
- Bumpless transfer between speed, load and pressure control modes to avoid process fluctuation
- Comprehensive protection: overspeed, start-up monitoring, valve position fault and emergency trip logic
- Supports LinkNet-HT distributed I/O modules to expand signal acquisition capacity
- Complete historical alarm, event log and trend data storage for post-fault analysis
- Multiple communication channels for seamless data exchange with plant DCS and SCADA systems
- Conformal coated PCB for sulfur and corrosive gas resistance in offshore and chemical sites
Important Reminder: Different part number variants (AC input / non-hazardous version) cannot be directly interchanged; replacement must match full part code 8200-1312.
Application Scope
Thermal power plant steam turbine control cabinets, petrochemical plant turbo-expander and compressor turbine systems, oil & gas offshore platform turbomachinery control, industrial generator steam turbine governing, waste heat power generation unit automation, and maintenance & retrofit projects of legacy Woodward turbine control systems.
