Woodward 5441-691 | Relay Field Terminal Module

Overview

The Woodward 5441-691 Relay Field Terminal Module is a dedicated interface unit designed to connect controller relay outputs to external field wiring in Woodward turbine and engine control platforms. Installed between the control processor and field devices, this module ensures electrical isolation, organized termination, and reliable switching of discrete signals in demanding industrial environments.

Engineered for seamless integration with MicroNet Simplex, MicroNet Plus, and 505/505E digital turbine controllers, the 5441-691 supports high-density relay output applications where operational safety, signal integrity, and long service life are critical.

Functional Characteristics

This module aggregates multiple relay outputs into a single terminal interface, simplifying cabinet wiring while protecting sensitive control electronics from field-side electrical stress. Each relay channel is designed to handle inductive and resistive loads with enhanced arc suppression, reducing contact wear and improving long-term reliability.

An integrated I/O lockout relay provides an additional safety layer, enabling system-level interlocks or emergency shutdown logic without external components.

Technical Specifications

General

• Manufacturer: Woodward
• Model / Part Number: 5441-691
• Module Type: Relay Field Terminal Module
• Compatible Systems: MicroNet Simplex, MicroNet Plus, 505, 505E

Relay Architecture

• Total Relays: 16
• Contact Form: DPDT (Double-Pole, Double-Throw)
• Relay Installation: Plug-in, socket-mounted
• Arc Suppression: Magnetic blow-out design
• Safety Feature: Integrated I/O lockout relay

Electrical Characteristics

• Relay Coil Voltage: 24 VDC
• Coil Current: Approx. 80 mA per relay
• Isolation: Electrical separation between control logic and field circuits
• Field Interface: Supports daisy-chain connection using low-density discrete cables

Mechanical Data

• ​Dimensions: 150 mm × 110 mm × 40 mm
• Weight: 0.45 kg
• Mounting: Panel or cabinet installation within control enclosures

Application Scope

The 5441-691 is commonly deployed in turbine, generator, and large engine control panels where multiple discrete outputs are required for valve actuation, breaker control, alarms, or permissive logic. Its design supports both continuous operation and safety-critical switching functions in power generation, oil and gas, and industrial energy systems.

Frequently Asked Questions

What is the main role of the 5441-691 module?

It acts as a relay termination and isolation interface, allowing controller relay outputs to safely drive external field devices.

Is this module compatible with all MicroNet systems?

Yes, it is designed for use with MicroNet Simplex, MicroNet Plus, and Woodward 505/505E turbine controllers.

Does the module include built-in safety features?

Yes, it includes an internal I/O lockout relay to support interlock and protection schemes without additional hardware.