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WOODWARD 9905-797 DSLC Module

WOODWARD 9905-797 DSLC Module

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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SKU: 9905-797
Vendor: Woodward
Category: DSLC Module
Related Series:

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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.

Hardware Specifications

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

Actuator Loop Feedback Response and Engine Speed Governing

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.

Frequently Asked Questions

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.

Field Installation Guidelines

  1. Mount the H461 mm x W265 mm x D59 mm sheet metal housing vertically on a flat enclosure panel using designated mounting holes.
  2. Route high-impedance 33K Ohm signal input wires in twisted-shielded cables separated from high-voltage AC bus leads.
  3. Ground the main metal frame directly to the cabinet protective earth grid using a low-impedance copper strap.
  4. Connect the main 24 VDC power feed through a fast-acting fuse to ensure continuous power protection.
  5. Provide a minimum surrounding clearance of 50 mm around the top and bottom chassis vents to maintain convective thermal heat dissipation.