Woodward 9905-857 2301D-ST Digital Speed Control
Woodward 9905-857 2301D-ST Digital Speed Control
Manufacturer: Woodward
Product No.: 9905-857
Condition:1000 in stock
Product Type: 2301D-ST Digital Speed Control
Product Origin: USA
Payment: T/T, Western Union
Weight: 2000g
Shipping port: Xiamen
Warranty: 12 months
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Woodward 9905-857 2301D-ST Digital Speed Control
Product Overview
- The Woodward 9905-857 is a 2301D-ST Digital Speed Control designed for precise speed regulation of steam turbines in industrial applications, such as power generation, marine propulsion, and mechanical drive systems. Part of Woodward__ 2301D series, this microprocessor-based controller provides advanced speed control, load sharing, and protection for small to medium-sized steam turbines. The __T_ designation indicates its specific configuration for steam turbine applications, offering features like isochronous speed control, droop control, and compatibility with Woodward actuators. The 9905-857 is ideal for single-unit or parallel operation, ensuring stable turbine performance under varying load conditions. Compared to Woodward__ analog governors (e.g., DYN1-10784-003-0-12) or genset controllers (e.g., EasyGen-3200-5, 8440-2050E), the 2301D-ST focuses on steam turbine speed control, not engine or generator management. It is distinct from Woodward__ protection relays (e.g., XD1G11), MicroNet CPU modules (e.g., 5501-381), communication modules (e.g., SST-ESR2-CLX-RLL), excitation systems (e.g., DECS-100-B15), and actuators (e.g., 8408-921).
Technical Specifications
- The 9905-857 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9905-857 |
| Manufacturer | Woodward |
| Description | 2301D-ST Digital Speed Control for Steam Turbines |
| Series | 2301D |
| Function | Regulates steam turbine speed, load sharing, and protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 4_8 MB (for firmware and configuration) RAM: 2_4 MB (for runtime data) |
| Display | No onboard display; LED indicators for status; configuration via external PC or HMI |
| Inputs | 2 speed inputs (magnetic pickup or proximity probes, 0.5_15 kHz) 4 analog inputs (configurable for 4_20 mA or 0_5 V, e.g., load sensor, remote setpoint) 4 discrete inputs (24 VDC, for start/stop, reset, or mode selection) |
| Outputs | 1 actuator output (4_20 mA or 0_200 mA, compatible with Woodward actuators) 2 analog outputs (4_20 mA, for speed or load monitoring) 3 relay outputs (dry contact, up to 250 VAC/2 A, for alarms or trips) |
| Communication Interfaces | 1 serial port (RS-232 or RS-485, Modbus RTU) USB (for configuration and diagnostics) |
| Control Modes | Isochronous speed control, droop control, load sharing, critical speed avoidance |
| Speed Regulation Accuracy | ±0.25% of rated speed (steady-state) |
| Protection Functions | Overspeed protection, actuator fault detection, loss of speed signal |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 100 events), status LEDs, real-time monitoring via Modbus |
| Compatibility | Woodward actuators (e.g., TG, PG, ProAct), magnetic pickups, proximity probes; third-party devices via Modbus RTU; integrates with SCADA systems |
| Power Supply | 18_40 VDC (24 VDC nominal) |
| Power Consumption | Approx. 10_15 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 enclosure for harsh environments) |
| Dimensions | Approx. 330 mm (H) x 190 mm (W) x 90 mm (D) |
| Weight | Approx. 1.5_2 kg |
| Mounting | Panel-mounted or chassis-mounted (via mounting brackets) |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent); ATEX/IECEx Zone 2 (optional) |
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Product Description
Woodward 9905-857 2301D-ST Digital Speed Control
Product Overview
- The Woodward 9905-857 is a 2301D-ST Digital Speed Control designed for precise speed regulation of steam turbines in industrial applications, such as power generation, marine propulsion, and mechanical drive systems. Part of Woodward__ 2301D series, this microprocessor-based controller provides advanced speed control, load sharing, and protection for small to medium-sized steam turbines. The __T_ designation indicates its specific configuration for steam turbine applications, offering features like isochronous speed control, droop control, and compatibility with Woodward actuators. The 9905-857 is ideal for single-unit or parallel operation, ensuring stable turbine performance under varying load conditions. Compared to Woodward__ analog governors (e.g., DYN1-10784-003-0-12) or genset controllers (e.g., EasyGen-3200-5, 8440-2050E), the 2301D-ST focuses on steam turbine speed control, not engine or generator management. It is distinct from Woodward__ protection relays (e.g., XD1G11), MicroNet CPU modules (e.g., 5501-381), communication modules (e.g., SST-ESR2-CLX-RLL), excitation systems (e.g., DECS-100-B15), and actuators (e.g., 8408-921).
Technical Specifications
- The 9905-857 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9905-857 |
| Manufacturer | Woodward |
| Description | 2301D-ST Digital Speed Control for Steam Turbines |
| Series | 2301D |
| Function | Regulates steam turbine speed, load sharing, and protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 4_8 MB (for firmware and configuration) RAM: 2_4 MB (for runtime data) |
| Display | No onboard display; LED indicators for status; configuration via external PC or HMI |
| Inputs | 2 speed inputs (magnetic pickup or proximity probes, 0.5_15 kHz) 4 analog inputs (configurable for 4_20 mA or 0_5 V, e.g., load sensor, remote setpoint) 4 discrete inputs (24 VDC, for start/stop, reset, or mode selection) |
| Outputs | 1 actuator output (4_20 mA or 0_200 mA, compatible with Woodward actuators) 2 analog outputs (4_20 mA, for speed or load monitoring) 3 relay outputs (dry contact, up to 250 VAC/2 A, for alarms or trips) |
| Communication Interfaces | 1 serial port (RS-232 or RS-485, Modbus RTU) USB (for configuration and diagnostics) |
| Control Modes | Isochronous speed control, droop control, load sharing, critical speed avoidance |
| Speed Regulation Accuracy | ±0.25% of rated speed (steady-state) |
| Protection Functions | Overspeed protection, actuator fault detection, loss of speed signal |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 100 events), status LEDs, real-time monitoring via Modbus |
| Compatibility | Woodward actuators (e.g., TG, PG, ProAct), magnetic pickups, proximity probes; third-party devices via Modbus RTU; integrates with SCADA systems |
| Power Supply | 18_40 VDC (24 VDC nominal) |
| Power Consumption | Approx. 10_15 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 enclosure for harsh environments) |
| Dimensions | Approx. 330 mm (H) x 190 mm (W) x 90 mm (D) |
| Weight | Approx. 1.5_2 kg |
| Mounting | Panel-mounted or chassis-mounted (via mounting brackets) |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent); ATEX/IECEx Zone 2 (optional) |
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