Woodward 5441-695C | MicroNet Series | Relay Output Module

Product Overview

The Woodward 5441-695C Relay Output Module is a rack-mounted discrete output interface engineered for Woodward MicroNet and MicroNet Plus control platforms. It converts low-level controller logic into electrically isolated relay signals capable of driving field-level devices used in critical turbine, engine, and generator control systems.

As a later hardware revision within the 5441-695 family, the “C” version incorporates component updates and long-term reliability improvements while preserving electrical and functional compatibility with existing MicroNet architectures.

System Compatibility

The 5441-695C is designed for seamless integration with Woodward digital control systems, including:

• MicroNet Simplex
• MicroNet Plus
• Selected Woodward turbine and engine control platforms using MicroNet I/O architecture

The module supports direct mapping to discrete output logic without additional signal conditioning.

Relay Output Architecture

This module provides multiple mechanically isolated relay channels intended for safety-critical and operational control functions.

• Total Outputs: 16 independent relay channels
• Relay Configuration: Form-C contacts (SPDT), suitable for normally open or normally closed logic
• Channel Isolation:
  • Galvanic isolation between control electronics and field wiring
  • Electrical separation between relay channels to reduce fault propagation

Typical control functions include shutdown actuation, permissive logic, alarm annunciation, and interlock signaling.

Electrical Specifications

The relay circuitry is designed for industrial load handling and noise immunity.

• Relay Coil Supply: 24 VDC (sourced internally by the control system)
• Contact Capability:
  • Rated for both resistive and inductive loads
  • Suitable for solenoids, pilot relays, contactors, and alarm circuits
• Protection Features:
  • Arc suppression across contacts
  • Internal isolation barriers to reduce EMI coupling
  • Designed to meet turbine control reliability requirements

Exact contact ratings depend on application class and wiring practices but conform to Woodward MicroNet relay standards.

Mechanical & Interface Design

The 5441-695C is built as a plug-in I/O module for standard MicroNet racks.

• Mounting: Slot-mounted module for MicroNet chassis
• Controller Interface: Backplane or ribbon-cable connection (system dependent)
• Field Wiring: Removable terminal blocks for simplified installation and maintenance
• Cooling Method: Passive convection cooling
• Construction:
  • Industrial-grade PCB
  • Socketed electromechanical relays for serviceability

Environmental & Reliability Characteristics

This module is intended for continuous operation in harsh industrial environments.

• Designed for high-vibration installations
• Stable performance under wide ambient temperature ranges typical of turbine enclosures
• Revision “C” hardware includes updated components selected for extended service life
• Suitable for mission-critical protection and shutdown logic

Typical Application Areas

The Woodward 5441-695C is commonly deployed in:

• Gas turbine control and protection systems
• Steam turbine sequencing and shutdown logic
• Compressor control panels
• Generator synchronization and auxiliary control
• Industrial safety shutdown and interlock systems

​Related & Comparable Models

Within the same relay output family:

• 5441-695: Earlier hardware revisions with equivalent functionality
• 5441-691: Relay termination and interface variants for specific rack configurations

All variants share core MicroNet relay logic compatibility, with differences primarily in hardware revision and field termination style.

FAQ

Q: Can the 5441-695C replace earlier 5441-695 revisions? A: Yes. The “C” revision is backward-compatible with earlier versions and is commonly used as a direct replacement.

Q: Are the relay outputs safety-rated? A: The module is designed for safety-critical turbine applications but must be used within a properly engineered control system and safety architecture.

Q: Does this module require external power for relay coils? A: No. Relay coils are powered internally through the MicroNet control system.