Woodward DSS-2 8800-1001 REV D (Dual Channel Digital Speed Switch)

Product Description

The Woodward DSS-2 (8800-1001 REV D) is a compact two-channel digital speed switch for engine and rotating machinery protection. It receives pulse signals from a magnetic pickup (MPU) sensor, monitors shaft speed, and drives two independent Form-C relay outputs. Typical functions include starter motor disable, overspeed shutdown, underspeed protection, and auxiliary speed alarm. REV D is a common hardware revision of this unit. It supports both local potentiometer adjustment and PC configuration via Woodward ACT calibration tool.

Features

• Part Number: DSS-2, 8800-1001, Revision: REV D
• Brand: Woodward
• Input: Magnetic pickup (MPU) signal, frequency range 10–10000 Hz
• Power supply: 9–30 VDC, reverse polarity protection
• Relay: 2 × independent Form-C relays, 10A resistive / 8A inductive @28VDC
• Setting: Two multi-turn potentiometers for local speed setpoint; ACT software for advanced logic, reset mode and relay polarity configuration
• Reset mode: Auto-reset (80% of set speed by default), latched reset or manual reset selectable
• Indicators: 3 status LED lamps for power, channel 1 and channel 2 status
• Terminal: 13-pin Euro screw terminal block
• Operating temperature: -40 ℃ ~ +85 ℃, high vibration resistance (4G)
• Certifications: CE, EMC compliant for industrial engine systems
• Manufacturer Status: Active spare, available original new stock, surplus and calibrated refurbished units
• Typical gross weight: approx 0.35 kg, origin: United States

Applications

• Diesel / gas generator set overspeed and underspeed protection
• Gas turbine, reciprocating engine speed monitoring interlock
• Compressor, pump and fan rotating machinery protection
• Marine engine, construction engine and agricultural engine safety control
• Engine control cabinet spare replacement and retrofit

FAQ

Q: What is the difference between REV D and other revisions?
A: REV D is the mature hardware revision, mainly component and PCB layout optimization; core function and wiring definition remain compatible with earlier revisions.

Q: Can DSS-2 work without the ACT calibration tool?
A: Yes, basic speed thresholds can be set directly via the front potentiometers; ACT is only needed for advanced functions such as latch reset and relay logic inversion.

Q: Does it replace the old single-channel speed switch?
A: Yes, it provides two independent speed thresholds in one unit, saving cabinet space for overspeed + starter disable dual protection requirements.