User guide

NOTE
LEROY-SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate
the latest technological developments. The information contained in this document may therefore be changed with-
out notice.
The MDX-ETHERNET is an optional module which is intended to be fitted in a variable speed drive. For the user's
own safety, this variable speed drive must be connected to an approved earth ( terminal).
If accidentally starting the installation is likely to cause a risk to personnel or the machines being driven, it is es-
sential to comply with the power connection diagrams recommended in the drive installation manual.
The variable speed drive is fitted with safety devices which can, in the event of a problem, control stopping and
thus stop the motor. The motor itself can become jammed for mechanical reasons. Voltage fluctuations, and in par-
ticular power cuts, may also cause the motor to stop. The removal of the causes of the shutdown can lead to re-
starting, which may be dangerous for certain machines or installations.
In such cases, it is essential that the user takes appropriate precautions against the motor restarting after an un-
scheduled stop.
The variable speed drive is designed to be able to supply a motor and the driven machine above its rated speed.
If the motor or the machine are not mechanically designed to withstand such speeds, the user may be exposed to
serious danger resulting from their mechanical deterioration. Before programming a high speed, it is important that
the user checks that the installation can withstand it.
The variable speed drive intended for use with the module which is the subject of this manual is designed to be
integrated in an installation or an electrical machine, and can under no circumstances be considered to be a safety
device. It is therefore the responsibility of the machine manufacturer, the designer of the installation or the user to
take all necessary precautions to ensure that the system complies with current standards, and to provide any de-
vices required to ensure the safety of equipment and personnel.
LEROY-SOMER declines all responsibility in the event of the above recommendations not being observed.
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This manual only describes the general features, characteristics and installation of the MDX-ETHERNET.
For the variable speed drive commissioning, refer to the appropriate manuals.
WARNING