Digital guide
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Woodward 9906-725
Product Name: 723PLUS Digital Speed Governor Controller (Marine Propulsion Engine Dedicated Firmware)
Product Introduction: 723PLUS low-voltage hardware body, ships with marine main propulsion control firmware preloaded, developed for marine reciprocating propulsion diesel engines. Focuses on propulsion speed regulation and remote speed raise/lower command processing from the navigation bridge. Adapts to marine engine room vibration, high-humidity and salt-fog conditions. Does not emphasize generator paralleling function, dedicated to single-unit propulsion power speed control.
Detailed content
Technical Specifications: Hardware electrical I/O specifications identical to 9906-719; firmware adds marine bridge command parsing, speed ramp rate limiting, and propulsion system interlock logic.
Functional Features:
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Local panel and remote bridge dual-source speed command switching
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Accelerator / decelerator slope settable to avoid shock from sudden throttle changes on marine main engine
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Propulsion system fault interlock and overspeed protection
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Supports handheld programmer and PC software commissioning, fault event recording and storage
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Non-volatile memory stores all propulsion-related setting parameters
Application Scenarios: River and ocean-going vessel single-unit propulsion diesel engines, engineering vessel main engine speed control.
Performance Parameters: Hardware environment and electrical performance identical to 9906-719; firmware adapted to marine power logic.
Material Composition: Cold-rolled steel sheet metal enclosure, industrial PCB, marine-grade terminals and D-SUB connectors.
Structural Features: Same as 9906-719, metal enclosed cabinet, wiring interfaces on same side, adapted for marine cabinet installation.
Working Principle: Collects main engine speed, receives bridge speed raise/lower switch commands, PID closed-loop output drives actuator to adjust fuel; executes marine-specific acceleration/deceleration slope limiting and interlock logic.
Installation Requirements:
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Marine cabinet installation, away from direct water spray, with salt-fog protection; avoid ship hull strong vibration sources
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All remote bridge control signals use shielded cable
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Power supply uses marine 24 V DC stabilized battery power
Usage Precautions:
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Strictly avoid condensation entering the enclosure interior; marine cabinet must be equipped with dehumidification measures
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Do not mix with generator set firmware programs; incorrect firmware will cause propulsion main engine runaway risk
