Product Details
Configured for overspeed detection in turbine control systems, the Woodward 8237-1369 (8237-1369 Overspeed Protection System) provides direct electrical execution of triple modular redundant (TMR) speed sensing and safety trip logic.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 8237-1369 |
| Brand | Woodward |
| Dimensions | 330 mm x 445 mm x 159 mm |
| Operating Temp | -20 deg C to +60 deg C |
| Power Consumption | 90 W (HV) / 100 W (LV) |
| Speed Signal Input | 100-32,000 Hz (MPU) / 0.5-25,000 Hz (Proximity) |
| Trip Output | 8 A at 220 VAC / 8 A at 24 VDC |
Actuator Loop Feedback Response and Thermal Heat Sink Dissipation Profiles
The 8237-1369 utilizes a TMR architecture requiring three independent speed inputs to monitor prime mover rotational frequency. The system performs continuous monitoring for overspeed or signal loss conditions, utilizing a 2-out-of-3 voting logic for shutdown relay execution. To manage high-speed transient response, the internal logic is optimized to process MPU (1-35 Vrms) or proximity probe signals while maintaining thermal heat sink dissipation profiles conducive to cabinet-mounted electronics. The analog 4-20 mA output stages are isolated to ensure speed meter accuracy, and the de-energize-to-trip architecture ensures that the system defaults to a safe state upon internal failure. The input stages must be properly shielded to prevent electromagnetic interference from inducing false counts within the 1-320 gear tooth range.
Frequently Asked Questions
Q: How does the system resolve signal discrepancies between the three speed sensing modules?
A: The 8237-1369 uses a voting logic gate to compare the three speed signals. If one sensor input diverges or indicates a failure, the system flags the fault while the remaining two modules continue to provide protection logic, preventing unnecessary turbine trips.
Q: Can the shutdown relay outputs be used for direct actuator control?
A: The shutdown relays are rated for 8 A at 220 VAC or 24 VDC and are intended for safety-critical circuit interruption. Direct high-current inductive load switching should be evaluated for arc suppression requirements to preserve relay contact longevity.
Field Installation Guidelines
- Mounting: Mount the unit either via bulkhead (wall/skid) or flush-mount vertically within a cabinet. Ensure the 330 mm x 445 mm x 159 mm envelope has sufficient airflow to comply with the -20 to +60 deg C operating range.
- Ingress Protection: The unit is rated for IP56. Ensure all conduit entries utilize appropriate cable glands and seals to maintain environmental integrity.
- Wiring: Terminate speed signals (MPU or Proximity) using shielded twisted-pair cabling. Ground the shield at the cabinet end only to prevent ground loops.
- Redundancy: Connect both high-voltage (88-264 VAC / 90-150 VDC) and low-voltage (18-32 VDC) power inputs if redundant power sourcing is required to ensure continuous protection during primary source failure.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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