Woodward 9907-135 GS3/LQ Driver Module

Overview

Configured for fuel valve actuator current control in Woodward GS3/LQ valve control systems, the Woodward 9907-135 (9907-135 GS3/LQ Driver Module) provides direct electrical execution of liquid and gaseous fuel modulation commands through actuator drive outputs and feedback processing.

Hardware Specifications

Actuator Loop Feedback Response and Fuel Control Characteristics

The Woodward 9907-135 applies actuator loop feedback response control to regulate fuel valve movement according to commanded input signals and position feedback. Therefore, the module maintains controlled current output to compatible GS3/LQ fuel valves while processing resolver or valve position feedback signals.

The module operates with 4-20 mA command inputs and converts control signals into valve actuator drive actions. Additionally, the driver supports dynamic fuel metering functions required for turbine speed regulation and load control loops.

The Woodward governor and fuel control architecture uses closed-loop actuator control methods. As a result, the module can coordinate fuel delivery adjustments with turbine control logic while maintaining controlled actuator response characteristics.

Frequently Asked Questions

Q: What type of input signal does the Woodward 9907-135 accept?
A: The module accepts a 4-20 mA analog control input signal for fuel valve command processing.

Q: Which Woodward fuel valves are compatible with the 9907-135 module?
A: The module is designed for GS3, LQ3, LQ25, LQ25T, and LQ bypass series liquid valves.

Q: Does the 9907-135 provide valve position feedback processing?
A: Yes. The module supports single speed feedback resolver or valve position feedback interfaces for closed-loop actuator control.

Field Installation Guidelines

• Install the module inside a control enclosure that provides protection from excessive vibration, moisture, and conductive contamination.
• Connect 10-32 VDC power wiring according to the applicable Woodward installation documentation.
• Use shielded cable for 4-20 mA control signal wiring and terminate cable shields according to the system grounding design.
• Separate analog signal wiring from high-current actuator wiring to reduce electrical interference.
• Verify actuator feedback wiring polarity and signal continuity before commissioning.
• Confirm valve actuator mechanical movement before applying operational fuel control commands.
• Inspect terminal connections and enclosure grounding during scheduled maintenance intervals.

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