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5438-820 - Speed Channel Module is available in stock which ships the same day.
5438-820 - Speed Channel Module comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: 5438-820
Manufacturer: Woodward
Series: MicroNet / NetCon
Product Type: Speed Channel / Speed Sensor Interface Module
Input Signal Type: Magnetic Pickup (MPU) / Proximity Probe
Channels: 4 Independent Speed Channels
Frequency Range: 1 Hz to 25,000 Hz
Communication Interface: VME Bus / Proprietary System Bus
Mounting: Chassis / Rack Mounted
Isolation: 500 Vrms Galvanic Isolation
Operating Temperature: -40 °C to +70 °C
Accuracy: 0.01% of full scale
Repair: 3-7 days
Weight: 0.78 kg
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
The 5438-820 Speed Channel Module is a high-precision input interface designed to monitor and process rotational speed signals for industrial turbines and engines. It is a core component of Woodward’s MicroNet and NetCon control systems, providing the high-speed data acquisition necessary for accurate governor control and overspeed protection. This module is capable of interfacing directly with Magnetic Pickups (MPUs) and eddy-current proximity probes. It converts raw frequency pulses from rotating shafts into high-resolution digital data, allowing the main control processor to calculate RPM with extreme accuracy. Its fast update rate ensures that the control system can respond instantaneously to load changes or sudden speed transients.
PRECISION SPEED MONITORING AND FILTERING:
It features four independent channels, each equipped with its own signal conditioning circuitry. This architecture allows for redundant speed sensing, where multiple sensors monitor the same shaft to ensure system reliability even if one sensor fails. The module includes advanced hardware filtering to eliminate electrical "noise" and harmonic interference, which are common in high-voltage power generation environments. By processing signals with 0.01% accuracy, the module enables the control system to maintain a stable steady-state speed, which is critical for maintaining grid frequency in power applications. The wide frequency range (up to 25 kHz) makes it versatile enough for use on both low-speed reciprocating engines and high-speed aero-derivative gas turbines.
OVERSPEED PROTECTION AND DIAGNOSTICS:
Safety is a primary focus of the 5438-820 design. The module includes onboard diagnostics that continuously check for "Loss of Speed" signals or sensor malfunctions. If a sensor fails or the signal becomes erratic, the module immediately flags the error to the main controller to prevent a "runaway" condition. In many configurations, this module serves as the primary data source for electronic overspeed protection. Its hardware-level processing ensures that speed limits are monitored independently of the main application software, providing a critical layer of hardware-based safety that can trigger a turbine trip if dangerous limits are exceeded.
AVAILABILITY AND SUPPORT:
World of Controls offers the 5438-820 module in both unused and fully refurbished conditions, ensuring immediate availability for critical operations. Each unit undergoes rigorous testing and is backed by a warranty for reliability and performance assurance. With a dedicated technical support team available 24/7, we assist with product selection, troubleshooting, and repair services to minimize downtime and maintain system efficiency. Contact the team for pricing, availability, or technical guidance tailored to your automation needs.
What is the Woodward 5438-820?
It is a Speed Channel Module used to sense and process rotational speed signals from turbines or engines, providing the data required for speed governing and overspeed protection.
What types of sensors can be connected to the Channel Module?
The module is compatible with standard industrial speed sensors, including Magnetic Pickups (MPU) and proximity probes that generate a frequency-based pulse signal.
How many sensors can one module handle?
The module features four independent speed channels, allowing for the connection of up to four separate sensors for either multi-shaft monitoring or redundant sensing of a single shaft.
What happens if a speed sensor fails?
The Module has built-in diagnostics that detect signal loss. In a redundant setup, the system can seamlessly switch to another active channel while alerting the operator to the sensor fault to prevent a system shutdown.
