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Woodward MPU User Manual

Woodward MPU
20 pages
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Manual 82510
(Revision V, 8/2022)
Original Instructions
Magnetic Pickups and Proximity Switches
for Electronic Controls
Reference Manual
Released
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Woodward MPU Specifications

General IconGeneral
BrandWoodward
ModelMPU
CategorySwitch
LanguageEnglish

Summary

General Safety Warnings

Important Definitions

Defines hazard symbols and terms used in warnings.

Overspeed / Overtemperature / Overpressure

Protect prime mover against runaway with shutdown device.

Personal Protective Equipment

Lists essential PPE for safe operation and handling.

Start-up Safety

Advises preparedness for emergency shutdown during startup.

Battery Charging Device Safety

Precautions for disconnecting battery from charging device.

Magnetic Speed Pickups (Chapter 1)

General Information

Introduces magnetic speed pickups (MPUs) and their function.

MPU Installation

Details mounting, air gap setting, and material considerations for MPUs.

MPU Air Gap and Gear Specifications

Provides charts and instructions for setting air gap based on gear parameters.

Installation and Operation Safety Requirements

General MPU/Sensor Certifications

Covers MPU types, certifications, and general specifications.

Installation Procedures

Details requirements for installing MPUs in hazardous areas.

Operation Guidelines

Explains output voltage and current characteristics during operation.

SIL Certified Versions

Discusses requirements for SIL rating and certifications.

Maintenance and Troubleshooting

States MPUs require no periodic maintenance and are not field-repairable.

Magnetic Pickup Troubleshooting

MPU Resistance List

Lists resistance values for different MPU models.

Proximity Switches (Chapter 2)

General Information

Explains proximity switch function and comparison to magnetic pickups.

Types of Proximity Switches

Describes two sizes of proximity switches and their applications.

Proximity Switch Power Supply

Details the required external DC power supply and current rating.

Proximity Switch Impedance Notice

Warns of potential damage due to low control impedance.

Checking Proximity Switch Operation

Instructions on how to test proximity switch functionality.

Proximity Switch Wiring

Illustrates typical wiring for sinking and source type proximity switches.

Appendix: Driving Other Devices with MPU Output

Attaching to Control Posts

Guidance on proper connection and polarity when using MPU output.

Governor Compatibility

Discusses considerations for EPG, 2500, and 2301 governors.

Shielding and Signal Integrity

Emphasizes shielding for remote circuits to prevent interference.

Minimum Signal Requirements

Notes minimum signal strength needed for cranking.

Revision History

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