MarelliMotori MEC-100 Manuel De L'utilisateur page 74

4.4. BEFORE STARTUP - IMPORTANT NOTES CONCERNING CONNECTIONS – RESTRICTIONS
For the MEC-100 installation, please consider the following important notes/restrictions:
1. For all the applications with MEC-100, the connections must always comply with the Marelli Motori connection diagrams
provided with the generator.
2. If included in the Marelli Motori connection diagrams, the de-excitation (shutdown) contact must always be used (see
instructions in Par. 3.12), unless prior agreement or authorization of Marelli Motori skilled personnel.
3. All types of switch or other devices not formally included in the Marelli Motori connection diagrams can not be used and/or
put on the MEC-100 output and/or exciter field, unless prior agreement or authorization of Marelli Motori skilled personnel.
4. If the MEC-100 application environment is affected by electromagnetic disturbance (EMI) higher than the specific limits
described in Par. 2.13, the User must equip the MEC-100 system of the the proper and suitable protections (shielded
cables, ferrites, etc.) on his own. EMI out of specifications can lead to unproper working of MEC-100 and/or to hardware
damages.
5. MEC-100 can be permanently damaged in case of imprioper voltage applied to the digital contact terminals, e.g. (but not
exclusively) due to interferences entering the connections.
In detail, it is compulsory to avoid voltage peaks higher than 40V on the terminals named Cx, M.
In case of doubt about interference peak values on these terminals, the user is bound to install dry contacts (relays) near to
the regulator (distance
not be longer than 2m.
6. MEC-100 can be permanently damaged if an external device connected to the analogue input of MEC-100 has not an
output galvanically insulated. Make sure the device has suitable output before connecting to the MEC-100.
7. The aluminum enclosure of MEC-100 must be electrically connected to GROUND.
8. Should further information about the connection diagrams and/or the used components be required, Marelli Motori Services
(see Par. 6.2) must always be contacted and/or involved before the MEC-100 commissioning.
WARNING: Before doing any operations and/or any set-up on MEC-100, is to be taken into consideration
that lethal voltage is present at the top panel when the unit is energized. Top panel connections and/or
operations with or without tools should be made only when the unit is de-energized. Is to be understood
that this lethal voltage affects all the components included in the card and all the parts electrically
connected to the controller.
Marelli Motori is under no liability for any damages which may occur to the AVR, the plant or the persons,
or for lost earnings, or financial loss, or system stoppages, due to missing application of these notes.
963857137_M
≤
50cm); suitable cabling (shielded and twisted cables) between dry contacts and MEC-100 must
MEC-100 – Marelli Motori
74