Product Description
Woodward 9905-864 505 Digital Turbine Control
Product Overview
- The Woodward 9905-864 is a 505 Digital Turbine Control, designed for precise control and monitoring of steam turbines in industrial applications such as power generation, oil and gas, and process industries. This microprocessor-based control unit is part of Woodward’s 505 series, offering advanced speed, load, and process control for single-valve or two-valve steam turbines driving generators, pumps, or compressors. The 505 provides automated startup, shutdown, speed governing, load control, and protection functions, with a user-friendly interface for configuration and monitoring. The 9905-864 is a specific variant of the 505, featuring a low-voltage power supply (18–32 VDC) and potentially specific firmware, hardware configurations, or certifications compared to other 505 models (e.g., 9905-792, 8200-1300). It supports integration with Woodward actuators and interfaces with plant control systems for seamless operation. The 9905-864 features robust communication protocols and a rugged design for reliable operation in harsh environments. It is distinct from Woodward’s genset controls like the EasyGen series (e.g., 8440-2179 EasyGen-3500XT, 8440-2050 EasyGen-3200-5), DSLC series (e.g., 9905-377, 8923-1262), EGCP-3 series (e.g., 8444-1082), SPM-D2 series (e.g., 8446-1048), SPM-A series (e.g., 9905-001K), 2301A series (e.g., 9905-463), MicroNet Plus (e.g., 8800-1001), TG-13 (e.g., 8516-050), Peak150 series (e.g., 8200-176), ProAct series (e.g., 8237-2595), 723PLUS series (e.g., 8270-1013), EPG systems (e.g., 8290-195), electronic governors (e.g., 8406-121), and actuators (e.g., 8408-921), focusing on digital control for steam turbines.
Technical Specifications
- The 9905-864 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9905-864 |
| Manufacturer | Woodward |
| Description | 505 Digital Turbine Control for Steam Turbines |
| Series | 505 |
| Function | Controls steam turbine speed, load, and process parameters; manages startup, shutdown, and protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 16–32 MB (for firmware and configuration) RAM: 8–16 MB (for runtime data) |
| Display | Integrated operator interface with LCD (text-based, 2-line or 4-line display) |
| Inputs | 8 analog inputs (4–20 mA, 0–5 V, configurable for pressure, temperature) 16 discrete inputs (24 VDC, e.g., start, stop, alarm reset) 2 speed inputs (magnetic pickup or proximity probe, 1–30 kHz) 1 RTD input (optional, for temperature monitoring) |
| Outputs | 4 analog outputs (4–20 mA for actuator control, monitoring) 8 relay outputs (dry contact, up to 250 VAC/5 A, for alarms, trips) 2 actuator outputs (0–200 mA or 4–20 mA, for single or dual valve control) |
| Communication Interfaces | 2 serial ports (RS-232/RS-485, Modbus RTU) 1 CANopen port (for Woodward devices) Ethernet (optional, Modbus TCP) USB (for configuration) |
| Control Modes | Speed control (isochronous or droop), load control, extraction pressure control, inlet pressure control, auto start/stop sequences |
| Redundancy | Non-redundant (redundant configurations require dual 505 units) |
| Diagnostics | Fault detection, event logging (up to 500 events), real-time data trending, status LEDs, alarm/trip indication |
| Compatibility | Woodward actuators (e.g., CPC-II, EGB, ProAct, 8408-921), magnetic pickups, pressure/temperature sensors; interfaces with synchronizers (e.g., DSLC, SPM-A), SCADA/DCS systems |
| Power Supply | 18–32 VDC (low-voltage model) |
| Power Consumption | Approx. 20–40 W |
| Environmental Specifications | Operating Temperature: -25°C to +65°C (-13°F to +149°F) Storage Temperature: -40°C to +85°C (-40°F to +185°F) Relative Humidity: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP20 (requires control cabinet); optional IP54/66 with enclosure |
| Dimensions | Approx. 356 mm (H) x 305 mm (W) x 76 mm (D) |
| Weight | Approx. 3–4 kg |
| Mounting | Panel-mounted or chassis-mounted in control cabinet |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, Lloyd’s Register); ATEX/IECEx Zone 2 (configuration-dependent) |