Woodward EPU-100 User manual

37561
Technical Manual 37561
EPU-100 „Electronic Pickup Unit“
Remanence Voltage Converter
for Asynchronous Generators
Technical Manual
Version 1.0

Manual 37561 Remanence Voltage Converter - EPU-100
Page 2/20 © Woodward
WARNING
Read this entire manual and all other publications pertaining to the work to be performed
before installing, operating, or servicing this equipment. Practice all plant and safety
instructions and precautions. Failure to follow instructions can cause personal injury and/or
property damage.
The engine, turbine, or other type of prime mover should be equipped with an overspeed
(overtemperature, or overpressure, where applicable) shutdown device(s), that operates
totally independently of the prime mover control device(s) to protect against runaway or
damage to the engine, turbine, or other type of prime mover with possible personal injury or
loss of life should the mechanical-hydraulic governor(s) or electric control(s), the actuator(s),
fuel control(s), the driving mechanism(s), the linkage(s), or the controlled device(s) fail.
Any unauthorized modifications to or use of this equipment outside its specified mechanical,
electrical, or other operating limits may cause personal injury and/or property damage,
including damage to the equipment. Any such unauthorized modifications: (i) constitute
"misuse" and/or "negligence" within the meaning of the product warranty thereby excluding
warranty coverage for any resulting damage, and (ii) invalidate product certifications or
listings.
CAUTION
To prevent damage to a control system that uses an alternator or battery-charging device,
make sure the charging device is turned off before disconnecting the battery from the
system.
Electronic controls contain static-sensitive parts. Observe the following precautions to
prevent damage to these parts.
•
Discharge body static before handling the control (with power to the control turned off,
contact a grounded surface and maintain contact while handling the control).
•
Avoid all plastic, vinyl, and Styrofoam (except antistatic versions) around printed circuit
boards.
•
Do not touch the components or conductors on a printed circuit board with your hands or
with conductive devices.
Important Definitions
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation that, if not avoided, could result in damage to
equipment.
NOTE
Provides other helpful information that does not fall under the warning or caution categories.
Woodward reserves the right to update any portion of this publication at any time. Information provided
by Woodward is believed to be correct and reliable. However, Woodward assumes no responsibility
unless otherwise expressly undertaken. © Woodward
All Rights Reserved.

Manual 37561 Remanence Voltage Converter - EPU-100
© Woodward Page 3/20
Revision History
Rev. Date Editor Changes
NEW 2014-02-27 GG Release
OUT-OF-DATE PUBLICATION?
This publication may have been revised or updated since this copy was produced. To verify
that you have the latest revision, be sure to check the Woodward website.
The revision level is shown at the bottom of the front cover after the publication number. The
latest version of most publications is available at:
http://www.woodward.com/publications
If your publication is not there, please contact your customer service representative to get the
latest copy.
Content
GENERAL INFORMATION ..........................................................................................................5
Introduction...............................................................................................................................................5
Safety Precautions ...................................................................................................................................5
Intended Use............................................................................................................................................6
ELECTROSTATIC DISCHARGE AWARENESS ...............................................................................7
INSTALLATION.........................................................................................................................8
Mounting and Removal ............................................................................................................................8
Wiring.......................................................................................................................................................9
Terminal and Interface .............................................................................................................................9
FUNCTIONAL DESCRIPTION ....................................................................................................10
Display....................................................................................................................................................10
Signal Conversion..................................................................................................................................10
CONFIGURATION ...................................................................................................................11
Configure easYgen series genset controller for EPU-100 input ..................................................11
OPERATION...........................................................................................................................12
Application..............................................................................................................................................13
Setup of the easYgen controller...................................................................................................13
Application Setup of EPU and easYgen.......................................................................................13

Manual 37561 Remanence Voltage Converter - EPU-100
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TROUBLE-SHOOTING .............................................................................................................14
SERVICE ...............................................................................................................................16
Product Service Options........................................................................................................................ 16
Returning Equipment for Repair ............................................................................................................ 16
Due to the fact that the EPU-100 is a low cost one PCB solution, replacement will be prioritized
before repair. Warranty conditions are not affected. Anyway please send the repair candidate
back for analysis reasons. Packing A Control............................................................................. 16
Packing A Control........................................................................................................................ 17
Return Authorization Number RAN ............................................................................................. 17
Replacement Parts ................................................................................................................................ 17
Further Information................................................................................................................................ 17
How to contact Woodward..................................................................................................................... 18
Technical Assistance............................................................................................................................. 19
Parts of Delivery
Please check delivery before starting installation.
This product comes with:
Piece(s) Name Remarks
1
EPU-100
Remanence Voltage Converter
1 Mini CD-ROM
Containing the EPU-100 Technical Manual (this manual), the Product
Specification and further information
1 Packaging -/-
The DIN rail is not(!) part of delivery
Table 1. Parts of delivery

Manual 37561 Remanence Voltage Converter - EPU-100
© Woodward Page 5/20
General Information
CAUTION
Only qualified workers should install this equipment. Such work should be performed only
after reading this entire set of instructions.
Apply appropriate personal protective equipment and follow safe electrical practices.
The successful operation of this equipment depends upon proper handling, installation, and
operation. Neglecting fundamental installation requirements may lead to personal injury as
well as damage to electrical equipment or other property.
Failure to follow these instructions will result in death or serious injury!
Introduction
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EPU means Electronic Pickup Unit. It converts the Remanence Voltage of the connected
Asynchronous Generator into a digital signal with a rotational frequency according to the number of
revolutions.
No adjustment needed.
In combination with Woodward’s easYgen devices installation and configuration becomes very easy.
EPU-100 input and supply power is already available. Configuration is just one parameter setting away.
EPU-100 is preferred especially for small gensets.
NOTE
The present manual has been prepared to enable the installation and commissioning of the
unit.
Due to the large variety of applications, it is not possible to cover every combination. The
manual is therefore only a guide.
Safety Precautions
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•Don’t use EPU-100 in hazardous area.
•Don’t use EPU-100 for medical devices.
•Installation by trained personnel only.