Product Description
Woodward 9907-173 2301D-ST Digital Load Sharing and Speed Control
Product Overview
- The Woodward 9907-173 is a 2301D-ST Digital Load Sharing and Speed Control, designed for precise speed and load control of small steam turbines driving generators, pumps, or compressors in industrial applications such as power generation, oil and gas, and process industries. This microprocessor-based control unit is part of Woodward’s 2301D series, offering advanced digital control for single-valve steam turbines with isochronous or droop speed governing, load sharing, and protection functions. The 2301D-ST is tailored for steam turbine applications, providing automated startup, shutdown, and precise speed regulation. The 9907-173 is a specific variant of the 2301D-ST, featuring a low-voltage power supply (18–40 VDC) and potentially specific firmware or configurations compared to other 2301D models (e.g., 8273-1011). It integrates with Woodward actuators and supports communication with plant control systems. The 9907-173 features 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, 9907-1182), DSLC series (e.g., 9905-976, 8923-1262), 505 series (e.g., 9907-163, 9905-792), 2301A series (e.g., 9905-463), EGCP-3 series (e.g., 8444-1082), SPM-D2 series (e.g., 8446-1048), SPM-A series (e.g., 9907-028), 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 small steam turbines.
Technical Specifications
- The 9907-173 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9907-173 |
| Manufacturer | Woodward |
| Description | 2301D-ST Digital Load Sharing and Speed Control for Steam Turbines |
| Series | 2301D |
| Function | Controls steam turbine speed and load; manages load sharing, startup, shutdown, and protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 8–16 MB (for firmware and configuration) RAM: 4–8 MB (for runtime data) |
| Display | No integrated display; uses external PC-based interface (Woodward Watch Window or Toolkit) or HMI |
| Inputs | 4 analog inputs (configurable for 4–20 mA, 0–5 V, e.g., pressure, temperature) 8 discrete inputs (24 VDC, e.g., start, stop) 1 speed input (magnetic pickup or proximity probe, 1–30 kHz) |
| Outputs | 2 analog outputs (4–20 mA or 0–200 mA for actuator control) 4 relay outputs (dry contact, up to 250 VAC/5 A, for alarms, trips) 1 actuator output (configurable for Woodward actuators, 4–20 mA or PWM) |
| Communication Interfaces | 1 serial port (RS-232/RS-485, Modbus RTU) 1 CANopen port (optional, for Woodward devices) Ethernet (optional, Modbus TCP) |
| Control Modes | Isochronous speed control, droop speed control, isochronous load sharing, auto start/stop sequences |
| Protection Functions | Overspeed, actuator fault, loss of speed signal, configurable alarms |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 300 events), real-time data trending, status LEDs |
| Compatibility | Woodward actuators (e.g., EGB, ProAct, CPC-II, 8408-921), magnetic pickups, synchronizers (e.g., DSLC, SPM-A); interfaces with third-party devices via Modbus or analog signals |
| Power Supply | 18–40 VDC (24 VDC nominal) |
| Power Consumption | Approx. 10–25 W |
| Environmental Specifications | Operating Temperature: -40°C to +70°C (-40°F to +158°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 with enclosure |
| Dimensions | Approx. 305 mm (H) x 254 mm (W) x 76 mm (D) |
| Weight | Approx. 2–3 kg |
| Mounting | Panel-mounted or DIN-rail (with adapter) |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, Lloyd’s Register); ATEX/IECEx Zone 2 (configuration-dependent) |