Woodward 5464-643 Discrete Input Module | MicroNet VME System

Product Description

Overview

The Woodward 5464-643 is a high-performance Discrete Input Module designed for the MicroNet Simplex, Plus, and TMR (Triple Modular Redundant) systems. It provides 48 optically isolated discrete inputs to safely interface field devices with the control CPU. Each input channel is conditioned through optical isolation to prevent electrical interference and ensure reliable data transfer to the system buffers.

This module is installed in a standard VME chassis, interfaced via Field Terminal Modules (FTMs), and supports robust diagnostics for fault detection and system monitoring. It is engineered for critical power generation, oil & gas, and industrial turbine control applications.

Key Features

Optical Isolation for Safe Signal Processing

• Each input channel uses optical isolators to separate field wiring from the MicroNet CPU circuitry.

• Protects the control system against surges, grounding faults, and electrical noise.

High-Density Input and Channel Mapping

• Supports 48 discrete input channels, labeled sequentially to match software and FTM assignments.

• Two FTMs provide access: J1 handles channels 1–24, and J2 handles channels 25–48.

Flexible Installation

• Modules slide into chassis card guides and secure via screws and front handles.

• Easy removal for maintenance without disturbing adjacent modules.

Diagnostics and Fault Monitoring

• Equipped with Fault LEDs for each module.

• Alerts the operator to cable faults, open circuits, or CPU issues.

• Advanced troubleshooting allows immediate verification of field or CPU failures.

Robust Field Interfacing

• Compatible with discrete field devices requiring 24 V DC logic levels.

• Each input draws 3 mA, minimizing field power requirements.

• Designed to operate in high-reliability, mission-critical environments.

Technical Specifications

Applications

• Monitoring field devices in MicroNet Simplex or TMR control systems.

• High-speed data acquisition for turbine, engine, and compressor control.

• Critical power generation and oil & gas systems requiring isolated discrete inputs.

• Redundant systems where uptime and reliability are paramount.

FAQ

Q: What is the function of the 5464-643 module?
A: It collects 48 optically isolated discrete input signals from field devices and passes them to the CPU via the VME interface.

Q: How is field wiring protected from control electronics?
A: Each channel is isolated using optical isolators, preventing surges or grounding faults from affecting the MicroNet CPU.

Q: What should I check if all Fault LEDs are illuminated?
A: If all 48 DI modules in a chassis show Fault LEDs during normal operation, inspect the CPU module for malfunctions, as it may be causing the fault indication.

Q: How is this module installed?
A: The module slides into card guides in the chassis, secured with two screws, and uses front handles for easy removal.