Product Description
Woodward 9907-1228 ProTech-SX Overspeed Protection System
Product Overview
- The Woodward 9907-1228 is a ProTech-SX Overspeed Protection System designed for critical safety applications in industrial turbines, engines, and rotating machinery, such as gas turbines, steam turbines, and compressors in power generation, oil and gas, and marine systems. This microprocessor-based safety device provides reliable overspeed protection by monitoring rotational speed and initiating shutdowns when predefined speed thresholds are exceeded, preventing catastrophic equipment failure. The ProTech-SX is a simplex (non-redundant) system, offering a cost-effective solution for applications where high reliability is required but redundancy is not mandatory. It features a modular design, user-friendly interface, and robust diagnostics for integration into safety instrumented systems (SIS). Compared to Woodward’s ProTech-GII (e.g., 9907-1183) or ProTech-203, the 9907-1228 is simpler, with a focus on single-channel overspeed protection. It is distinct from Woodward’s genset controllers (e.g., EasyGen-3500-5, 8440-2087), protection relays (e.g., XD1G11), communication modules (e.g., SST-ESR2-CLX-RLL), excitation systems (e.g., DECS-100-B15), electronic governors (e.g., DYN1-10784-003-0-12), and actuators (e.g., 8408-921).
Technical Specifications
- The 9907-1228 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 9907-1228 |
| Manufacturer | Woodward |
| Description | ProTech-SX Overspeed Protection System |
| Series | ProTech-SX |
| Function | Monitors rotational speed and initiates shutdown for overspeed conditions |
| 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 | Graphical LCD, 128x64 pixels, for status and configuration |
| Inputs | 2 speed inputs (magnetic pickup or proximity probes, 0.5–25 kHz) 2 discrete inputs (24 VDC, for external reset or test signals) |
| Outputs | 2 relay outputs (dry contact, up to 250 VAC/5 A, for trip and alarm) 1 analog output (4–20 mA, for speed monitoring) |
| Communication Interfaces | 1 serial port (RS-485, Modbus RTU, for monitoring) USB (for configuration and diagnostics) |
| Protection Functions | Overspeed protection, acceleration detection, test mode for overspeed simulation |
| Trip Accuracy | ±0.1% of setpoint speed |
| Response Time | <20 ms (from overspeed detection to trip output) |
| Redundancy | Non-redundant (simplex architecture) |
| Diagnostics | Fault detection, event logging (up to 100 events), speed trending, status LEDs |
| Compatibility | Compatible with Woodward control systems (e.g., MicroNet, 505), magnetic pickups, proximity probes, and third-party SIS; integrates with SCADA via Modbus RTU |
| Power Supply | 18–32 VDC (24 VDC nominal) or 120–240 VAC (50/60 Hz, configuration-dependent) |
| Power Consumption | Approx. 10–15 W |
| Environmental Specifications | Operating Temperature: -20°C to +60°C (-4°F to +140°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 | IP54 (front panel, when properly mounted); IP20 (rear) |
| Dimensions | Approx. 200 mm (H) x 150 mm (W) x 80 mm (D) |
| Weight | Approx. 1.5–2 kg |
| Mounting | Panel-mounted (cutout dimensions per manual) |
| Certifications | CE, UL, CSA, SIL 2 certified (per IEC 61508), marine certifications (e.g., DNV, ABS, configuration-dependent); ATEX/IECEx Zone 2 (optional) |