Safety Precautions; Technical Specifications - MarelliMotori M31FA600A M EC-20 Manual De Instrucciones

1. INTRODUCTION
This User Manual provides general installation and use information regarding the Marelli Motori regulator
whose code is reported on the cover and inside the document, mounted on Marelli Motori generator types
indicated in Chap. 3.
Before starting the generator and performing any type of regulation operation, carefully and completely read
all of the instructions contained in this manual.
IMPORTANT NOTE: This User Manual not intended to cover all of the possible application or installation
variations nor to provide data or information to support every possible contingency. The connection diagrams
provided with the generator, its Use and Maintenance Manual and any additional information provided by
qualified Marelli Motori technical personnel supplements and completes this manual.
In particular, the diagrams reported in this document provide only an example of the connection and
operation mode for the device; these do not cover all possible application cases and are not a substitute for
the connection diagrams normally provided with the generator.
If further application information becomes necessary, please contact Marelli Motori Services.

2. SAFETY PRECAUTIONS

ATTENTION: DO NOT TOUCH THE CONTROL MODULE WHEN IT IS UNDER POWER.
When the control module is under power (or the machine is in rotation) the upper part of the device
(connection side) and all parts electrically connected to it contain lethal voltage. There could be also
components with high temperatures that are dangerous in the event of direct contact during normal operation
on the component module.
Any operation on the cabling and/or mechanical installation of the regulator must be performed by
qualified and informed personnel, with the generator halted and making sure that a sufficient amount
of time has passed for the regulator components to have cooled down to a temperature that is not
dangerous to personal safety.
Each calibration operation must be performed with the machine running without a load by qualified
and informed personnel using the proper tools to guarantee electrical safety (for example, insulated
screwdrivers) and wearing all of the necessary personal safety devices (especially safety glasses
and protective gloves).
Marelli Motori denies any responsibility for damage to the regulator, system or people, for loss of profit or
money, or for system shutdowns caused by the failure to observe the safety and/or installation/use
instructions reported in this User Manual.
3. APPLICATION
The M31FA600A MEC-20 voltage regulator is suitable for synchronous generators constructed by Marelli
Motori.
NOTE: For information on compatibility with different sizes or series of synchronous generators other than
those indicated above, contact Marelli Motori Services.

4. TECHNICAL SPECIFICATIONS

The M31FA600A voltage regulator is a micro-processor device with pulse-width modulation (PWM) output
stage, and can be calibrated using potentiometers. The circuit board is resin-bonded in order to maintain a
high degree of operational reliability even in difficult environmental conditions (high levels of humidity, dust, a
salty atmosphere) and in the presence of vibrations.
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M31FA600A MEC-20
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