Woodward 5501-371 MicroNet Simplex Interface Module

Product Overview

The 5501-371 is a MicroNet Simplex Interface Module manufactured by Woodward. It is designed to operate as a signal interface and communication bridge within MicroNet Simplex control architectures, supporting stable and deterministic data exchange between the controller core and external field-level components.

This module is commonly deployed in turbine and generator control systems where long-term reliability, predictable signal handling, and compatibility with MicroNet Digital Control platforms are essential.

Functional Description

The 5501-371 module functions as a dedicated interface layer rather than a conventional discrete or analog I/O card. It enables structured signal routing and conditioning for MicroNet systems, supporting:

• Magnetic Pickup (MPU) speed signal processing
• Interfacing with Analog I/O Field Terminal Modules (AIO FTM)
• Internal signal distribution within Simplex controller configurations
• Deterministic communication paths between controller logic and field devices

Its design supports Simplex architectures, offering a balance between system redundancy requirements and overall system cost.

Mechanical Characteristics

• Form Factor: MicroNet Simplex standard plug-in module
• Mounting Method: Chassis-mounted, backplane-connected
• ​Dimensions: 160 × 160 × 120 mm
• Weight: 1.82 kg
• Country of Manufacture: United States

Electrical & Interface Characteristics

• Module Classification: Interface and signal handling module
• I/O Nature: Indirect signal interface (no direct field wiring)
• Supported Signal Types:
  • MPU speed input signals
  • Analog signal paths via external AIO FTMs
• Architecture Support: MicroNet Simplex systems
• Signal Handling: Internal routing, conditioning, and controller interfacing

Note: Detailed electrical ratings are not publicly released by the manufacturer and are typically provided through system-level documentation.

System Compatibility

The 5501-371 is compatible with MicroNet Simplex Digital Control platforms used in:

• Gas turbine control systems
• Steam turbine control systems
• Generator protection and load control
• Industrial process control environments requiring stable interface layers

Reliability, Service, and Lifecycle

• Typical Availability: In stock through automation surplus and service providers
• Condition Options: New, unused surplus, refurbished, or professionally rebuilt
• Repair Support: Widely supported; standard repair turnaround 3–7 business days
• Warranty: Commonly supplied by vendors, typically up to 12 months

The module is designed for continuous operation in high-vibration and electrically noisy environments common in turbine control applications.

FAQ

Q: Is the 5501-371 a direct analog or digital I/O module? A: No. It operates as an interface and signal-routing module. Field wiring is handled via associated terminal modules such as AIO FTMs.

Q: Can this module be used in redundant MicroNet systems? A: This model is intended for Simplex architectures. Redundant systems require different module configurations.

Q: Are MPU signals terminated directly on this module? A: MPU signal handling is supported functionally, but physical termination is typically managed through external field terminal modules.