Product Overview

The Woodward 5464-659 is a Smart I/O module from the MicroNet Digital Control series.
This module features its own on-board microcontroller for intelligent processing.
During initialization, the module runs power-on self-tests automatically.
The LED turns off after these tests pass and the CPU initializes the module.
Conversely, the LED illuminates to indicate an I/O fault condition.
Origin of this 5464-659 module is the United States (US).
Therefore, it meets Woodward's high quality and reliability standards.

Technical Specifications

Physical Characteristics

HS Code for the Woodward 5464-659 is 85389091 for customs purposes.
Dimensions measure 16cm x 16cm x 12cm for a compact footprint.
Product net weight equals 0.8 kg for easy handling.
The plastic cover includes a cutout for visible fuse access.
This fuse can be changed without removing the entire cover.

Output Capabilities

The 5464-659 generates proportional actuator-driver signals for control.
Maximum output range reaches 0 to 25 mAdc or 0 to 200 mAdc .
These signals drive integrating or proportional actuators.
Both hydromechanical and pneumatic actuators are compatible.
Each actuator may have up to two position feedback devices.
Several versions exist with different output current capabilities.

Cable Requirements

A MicroNet low-density discrete (gray) cable must be used with this module.
Do not use an analog (black) cable for the Woodward 5464-659 .
Using the wrong cable may cause communication errors.
Always verify cable type before connecting to the module.

Smart I/O Architecture

The Woodward 5464-659 belongs to the Smart I/O module family.
On-board microcontrollers handle rate-group scheduling locally.
The CPU broadcasts a "key" to all I/O cards periodically.
This key tells each module which rate groups to update.
Consequently, minimal CPU intervention is required for scheduling.
Each Smart I/O module also includes on-card on-line fault detection.
Automatic calibration and compensation occur without user action.

Precision Voltage Reference

Every input channel on the 5464-659 has its own precision voltage reference.
Once per minute, the on-board microcontroller reads this reference.
This reading occurs while the module is not reading inputs.
The microcontroller uses this data for two critical purposes.
First, it enables fault detection on each channel.
Second, it provides automatic temperature compensation and calibration.

Fault Detection Limits

Limits are set for expected readings from each voltage reference.
If a reading falls outside these limits, the system detects a fault.
Possible failures include the input channel, A/D converter, or precision reference.
The microcontroller then flags that specific channel as faulty.
Consequently, the CPU executes whatever action the application engineer programmed.

Actuator Driver Functionality

The Woodward 5464-659 receives digital information from the CPU directly.
It then generates four proportional actuator-driver signals for control.
These signals are truly proportional within their specified ranges.
The module monitors output voltage and current of each channel continuously.
If a fault is detected, the system alerts operators immediately.
Output current drivers can be disabled individually by the system.
When a fault prevents normal operation, the FAULT LED illuminates.

Output Scaling and Scheduling

The microcontroller scales output values using calibration constants.
These constants are stored in EEPROM for non-volatile retention.
Scheduling ensures outputs occur at the proper time for each channel.
Dual-port memory receives output values through the VME-bus interface.

Fuse and Maintenance

Each I/O module including the Woodward 5464-659 has a visible fuse.
This fuse can be changed through a cutout in the plastic cover.
If the fuse blows, replace it with a fuse of the same type and size.
Always disconnect power before attempting fuse replacement.
Inspect the fuse periodically as part of routine maintenance.

Installation Guidelines

First, verify that the Woodward 5464-659 matches your application requirements.
Ensure the output current range (25mA or 200mA) suits your actuator.
Mount the module securely in the MicroNet chassis or rack.
Use only the MicroNet low-density discrete (gray) cable for connections.
Do not use analog (black) cable under any circumstances.
Connect the actuator feedback devices to the appropriate terminals.
Verify that each actuator has the correct number of feedback devices.
Apply power and observe the LED behavior during initialization.
Confirm the LED turns off after successful self-test completion.
If the FAULT LED illuminates, check the application program configuration.

Configuration Guidelines

Configure the Woodward 5464-659 using the MicroNet system software.
Set the rate group for each channel according to your speed requirements.
Define fault handling actions for each possible fault condition.
Calibration constants are stored automatically in EEPROM.
Periodically verify that automatic temperature compensation is working.
Test each channel's fault detection by introducing simulated faults.

Package Contents

• 1 x Woodward 5464-659 digital speed sensor / Smart I/O module

• 1 x Fuse (pre-installed, visible through cover cutout)

• 1 x Replacement fuse of same type (spare)

• 1 x Installation and configuration manual

• 1 x MicroNet system compatibility guide

Frequently Asked Questions (FAQ)

1. What is the difference between Smart I/O and standard I/O?

Smart I/O modules like the Woodward 5464-659 have on-board microcontrollers. They handle scheduling and fault detection with minimal CPU intervention.

2. Can I use this module with a 0-25mA or 0-200mA actuator?

Yes, the Woodward 5464-659 supports both ranges. The specific part number indicates the maximum output current capability.

3. What happens when the fuse blows on this module?

The channel stops functioning and the system detects a fault. Replace the fuse in the 5464-659 with one of the same type and size.

4. Why must I use a gray cable instead of a black cable?

The gray cable is a MicroNet low-density discrete cable. The Woodward 5464-659 requires this specific cable for proper signal integrity.

5. How does automatic temperature compensation work on this module?

Once per minute, the on-board microcontroller reads a precision voltage reference. The 5464-659 uses this data to calibrate each channel automatically.