9907-031
9907-031
9907-031
9907-031
9907-031
9907-031
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  • Lifecycle status

    Discontinued / Obsolete by OEM
    Apter Power supports legacy 723 spare sourcing and application-record review.

9907-031

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Woodward 9907-031 is a low-voltage 723 digital speed and load control for reciprocating engines with DSLC compatibility.
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Technical specifications for 9907-031

  • Manufacturer:
    Woodward
  • Part Number:
    9907-031
  • Product Family:
    Woodward 723 Series
  • Product Type:
    723 Digital Speed Control
  • Stock:
    1
  • Woodward part number:
    9907-031
  • Control family:
    723
  • Supply class:
    Low-voltage variant
  • Primary duty:
    Reciprocating-engine speed and load control
  • Official manual:
    Woodward 02784 Rev A
  • Weight:
    2.92 kg
  • Estimated shipping dimensions:
    41.5x28.5x5.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Engine Inputs Control Outputs Program Recovery Product Applications

Features:

  • Engine control: combines speed regulation and load control for reciprocating-engine applications.
  • Sensor redundancy: accepts two magnetic-pickup or proximity speed inputs.
  • System interface: supports DSLC, serial communication and optional LinkNet application functions.
The 9907-031 order number closes the low-voltage hardware identity within the 723 DSLC-compatible range.

Application settings determine actuator behavior, speed references, fuel limits and the communication profile used by the engine package.

Commissioning restores local speed control first, then adds load sharing and remote interfaces after direction and feedback are proven.

Apter Power supports legacy-spare review and quotation for Woodward 9907-031 723 Digital Speed Control.
Woodward 9907-031 723 Digital Speed Control Manuals,Datasheets,Link

Important Notice: Use the complete 9907-031 product model in every document request.

  • Speed channels: two sensor inputs provide the engine-speed evidence used by the control.
  • Discrete states: configured contacts establish operating modes and permissive conditions.
  • Analog references: assigned signals can influence speed, load or limiting functions.
  • Application file: configured input use must match the installed engine package.
  • Actuator command: output direction and range must agree with the fuel or energy-control device.
  • Load interface: the DSLC-compatible path supports coordinated generator loading.
  • Fuel limiting: configured limits protect the engine during starting and load transitions.
  • Alarm behavior: relay and communication responses remain tied to the approved application settings.
  • Configuration capture: save the active 723 application before removing the legacy control.
  • Sensor proof: confirm both speed signals and their selected priority during controlled rotation.
  • Direction test: prove actuator motion before the engine is allowed to start.
  • Network return: restore Modbus, HMI, DSLC or LinkNet functions only after stable local control.
  • Reciprocating generator sets: regulates engine speed and supports coordinated electrical-load control.
  • DSLC-based plants: retains the installed load-sharing interface and engine-package logic.
  • Dual-speed-sensor packages: uses two feedback inputs where the application requires sensor selection or redundancy.
  • Legacy engine-control recovery: restores an existing 723 application when the configuration and wiring record are available.
Description
Designed for reciprocating engines, 9907-031 combines speed and load control with two speed-sensor inputs, configurable I/O and a DSLC-compatible load-sharing interface. Woodward identifies this order number as the low-voltage 723 variant.

The operating identity of 9907-031 lives in its application settings as much as in the hardware. Fuel-limiting logic, actuator direction, MPU selection, Modbus/HMI communications and LinkNet use can differ across otherwise similar engine packages.

A controlled replacement starts with a parameter and wiring record, then proves cranking detection, speed feedback and actuator direction before fuel is admitted. Only after stable local operation should load-sharing, remote setpoint and communication functions be returned to service.
Alternative Names
9907031 9907 031 9907–031 99O7-031 9907-O31 9907-03I Woodward 9907-031 723 9907-031 9907-031 DSLC P/N 9907-031
Technical notes
9907-031 is the low-voltage member of the DSLC-compatible 723 group. Do not substitute 9907-032, 9907-033 or 9907-034 by family name alone; supply voltage, torsional-filter option and recorded application configuration must match.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
An offered 723 control has a different 9907 number. Can it replace 9907-031?
Not by family name alone; stop until supply class, filter option, I/O and application-file compatibility are proven for the exact order number.
The engine will not recognize speed after a 9907-031 exchange. What should be checked before tuning?
Check MPU/proximity wiring, air gap, channel selection and measured signal level before changing dynamic parameters.
Why must actuator direction be proved before starting the engine?
A reversed or incorrectly ranged 9907-031 output can command fuel in the unsafe direction, so direction is an explicit pre-start stop gate.
Can the old control be removed before its application file is saved?
Do not remove it unless a validated configuration backup or complete parameter record exists; hardware alone cannot reconstruct the engine logic.
Local speed control works but DSLC load sharing does not. What is the next decision point?
Keep the unit out of automatic loading and verify DSLC wiring, communication state and configured load interface against the plant record.
What should receiving compare on 9907-031?
Compare the exact part number, low-voltage identity, connectors, physical condition and any stored application or calibration evidence.