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The WOODWARD 9905-797, also cataloged as the 9905-797 Digital Synchronizer and Load Control (DSLC) Module, operates as a dedicated hardware component for automatic phase matching, VAR/PF balancing, and LON-based multi-engine...
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The WOODWARD 9905-797, also cataloged as the 9905-797 Digital Synchronizer and Load Control (DSLC) Module, operates as a dedicated hardware component for automatic phase matching, VAR/PF balancing, and LON-based multi-engine load distribution across engine control networks.
| Parameter | Specification |
|---|---|
| Model | 9905-797 |
| Brand | WOODWARD |
| Origin | USA |
| Weight | 2.5 kg |
| Dimensions | H461 mm x W265 mm x D59 mm |
| Operating Temp | -40 to 70 deg C (-40 to 158 deg F) |
| Power Consumption | 24 VDC nominal (12 V max operating current) |
| Display | 24-character LEDs |
| Enclosure Type | Sheet Metal |
| Signal Input Impedance | 33K Ohms |
| Transient Protection | 900 VDC power supply transient protection |
| I/O Capability | 2 analog inputs, 2 channels |
The processing logic calculates real-time RMS power and slip frequency parameters to execute phase matching, voltage matching, and bumpless load transitions. By transmitting bias corrections via the Local Operating Network (LON) and analog output channels, the hardware regulates speed governing loops directly. This continuous closed-loop feedback maintains stability during sudden electrical tie-breaker closing or baseload power import/export shifts.
Q: How does the internal power conditioning safeguard against electrical transients?
A: The module incorporates power supply transient protection rated to suppress voltage spikes up to 900 VDC, preventing logic resets and hardware degradation during power supply disturbance events.
Q: How is load distribution managed across multiple engine-generator sets?
A: Load sharing is executed over a dedicated Local Operating Network (LON) bus, allowing multiple units to digitally calculate proportional kilowatt and VAR demand without discrete analog cross-bias cabling.
