Description
Woodward 8800-1001 – DSS-2 Dual-Channel Digital Speed Switch
Product Overview
The Woodward 8800-1001 (DSS-2) is a sophisticated dual-channel digital speed switch designed to monitor engine RPM and provide critical control functions based on frequency setpoints. Engineered for high-reliability environments, this device processes signals from a magnetic pickup (MPU) to determine rotational speed with high precision. Its primary role in industrial automation is to automate sequence transitions, such as crank termination, and to act as a safety watchdog through overspeed or underspeed protection. By integrating the 8800-1001 into a control system, engineers can ensure that expensive rotating equipment is protected from mechanical stress and catastrophic failure due to uncontrolled velocity.
Technical Specifications
- Brand: Woodward
- Model: 8800-1001
- Warranty: One Year
- Condition: 100% New & Original
- Input Voltage: 9–30 VDC
- Input Signal: Magnetic Pickup (MPU), 2.0 Vac minimum
- Frequency Range: 10 Hz to 10,000 Hz
- Output Type: Two independent Relay Channels (Form C)
- Relay Rating: 10A (Resistive) / 8A (Inductive) @ 28 VDC
- Operating Temp: -40°C to +85°C (-40°F to +185°F)
- Adjustment: Multi-turn potentiometers or PC-based Calibration Tool (ACT)
- Protection Rating: IP65 Enclosure (Encapsulated)
Key Features & Benefits
- Dual Independent Channels: Provides two separate relays that can be configured for different setpoints, allowing one unit to handle both crank termination and overspeed protection simultaneously.
- Ruggedized Construction: The unit is fully encapsulated, making it resistant to the high-vibration and chemically harsh environments common in engine rooms and industrial skids.
- Flexible Calibration: Supports both manual analog adjustment via onboard potentiometers for quick field setup and digital PC-based calibration for applications requiring extreme precision.
- Transient Voltage Protection: Designed with reverse-polarity protection and high-grade electrical shielding to prevent damage from power surges or electromagnetic interference (EMI).
Application Scenarios
- Power Generation (Gensets): The module is frequently used for automated start-up sequences (crank termination) and as a secondary safety layer to prevent generator overspeed conditions.
- Marine Propulsion Systems: Deployed in marine engine control to monitor engine health and provide emergency shutdown signals if shaft speeds exceed safe operating parameters.
- Industrial Pump Stations: Used in remote pumping stations to monitor diesel-driven pumps, ensuring the starter motor disengages correctly and the pump operates within its designated RPM curve.
Frequently Asked Questions (FAQ)
- Q: What is the primary function of the 8800-1001?
- A: It is a digital speed switch used to monitor engine RPM and trigger relay outputs at specific frequency setpoints for safety and control.
- Q: Is 8800-1001 compatible with legacy systems?
- A: Yes, it is designed to work with standard Magnetic Pickups (MPU) and broad DC voltage ranges, making it an ideal drop-in replacement for older analog speed switches.
- Q: Can the setpoints be locked once configured?
- A: Yes, when using the Woodward PC-based calibration software, setpoints can be digitally fixed to prevent unauthorized manual tampering.
In summary, the Woodward 8800-1001 remains a global standard for engine speed monitoring, offering the reliability and precision required for mission-critical industrial applications.
