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5438-822 - Final Driver Module is available in stock which ships the same day.
5438-822 - Final Driver Module comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: 5438-822
Manufacturer: Woodward
Series: 505 / MicroNet / NetCon Series
Product Type: Actuator Final Driver Module
Drive Channels: Multi-Channel Precision Actuator Output
Output Current Range: 0–20 mA / 4–20 mA / Single/Dual Integrating Actuator Drive
Input Signals: Internal System Backplane Bus Command Lines
Loop Control Isolation: Galvanic Isolation Protection
Status Diagnostics: Front-Panel LED Status Indicators
Form Factor Frame Type: Standard Plug-in Chassis Module
Operating Temperature Limits: -40°C to +70°C (-40°F to +158°F)
Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)
Relative Humidity Threshold: 5% to 95% (Non-condensing)
Repair Time: 3–7 Days
Availability: In Stock
Weight: Approximately 1.35 kg (2.98 lbs)
Country of Origin: United States
The 5438-822 is a Final Driver Module designed and manufactured by Woodward. Designed for use in digital governor and turbine control chassis, this module converts high-level positioning and valve demand commands from the central processing core into precise electrical output signals that directly drive fuel control valves, steam admission valves, and variable geometry actuators. By serving as the power output interface stage, the Module ensures responsive, dynamic valve positioning across gas turbine, steam turbine, and industrial engine installations.
PRECISION CURRENT DRIVER & LOOP ISOLATION:
The 5438-822 incorporates high-precision current regulation circuitry to maintain accurate actuator position demand despite thermal variations or load changes in downstream field coils. Onboard filtering protects output stages against inductive voltage spikes and external electrical noise. Integrated galvanic isolation prevents field ground loops and electrical transients from propagating backward into the core controller backplane, protecting critical microprocessor architecture during severe plant fault events.
LOOP-FAULT SAFEGUARDS & FAIL-SAFE RESPONSE:
The module features continuous loop monitoring to verify output driver health and loop wiring integrity. Front-panel LED indicators display real-time status for power availability, channel activation, and output fault detection. In the event of an open-loop condition, short-circuit fault, or loss of command signal, the module triggers built-in safety fallback logic to return connected actuators to a predetermined fail-safe position, protecting turbomachinery from overspeed or thermal stress.
WHY BUY FROM WOC
WOC is a globally recognized supplier specializing in the supply, repair, and lifecycle management of Woodward turbine control system components, including the Final Driver Module. Our experienced engineering team ensures every module undergoes comprehensive inspection, functional testing, output current calibration, diagnostic verification, and performance validation before shipment to guarantee dependable operation in critical industrial applications. We maintain an extensive inventory of UNUSED and professionally REBUILT Woodward modules, enabling faster replacement solutions and reducing costly turbine downtime. With advanced testing capabilities, warranty-backed products, technical support, competitive pricing, and worldwide express shipping, we provide reliable solutions for power generation, oil & gas, and industrial facilities requiring high-performance Woodward control system spare parts. Our commitment to quality, quick response, and customer-focused support makes us a trusted partner for maintaining the availability and reliability of legacy and active turbine control systems.
What is Woodward 5438-822?
The 5438-822 is an Actuator Final Driver Module manufactured by Woodward. It converts control system processor demand signals into precise output currents to drive turbine fuel valves and positioners.
How does the Module respond to a broken field loop connection?
If an open-circuit or broken wire fault is detected in the output wiring, the module detects the impedance shift, illuminates a front-panel fault status LED, and reports the channel failure to the main processor to trigger system alarms or safe shutdown routines.
What steps should be taken if the actuator output signal from the Module fluctuates?
First, check for loose terminal wiring and inspect the field cabling shield grounding to rule out electromagnetic interference. Verify output current using a calibrated multimeter across test points; if the input command signal is stable but the driver current drifts or oscillates independently, the module internal output stage requires calibration or repair.
Where can I buy the Woodward Final Driver Module?
You can purchase the Woodward Final Driver Module from World of Controls, a global supplier specializing in industrial turbine control system components. We offer the module in both UNUSED and professionally REBUILT conditions, along with repair and exchange services for legacy Woodward control systems.
