1.12. Protection Against Electrical Interference
The boards has been designed to be protected against various types of interferences, following
standard/normal requirements according to the requirements of the norm, against accidental mistakes
and localization. Never the less we advise that the following rules are respected:
• Connect all metal masses to ground;
• Connect all unused conductors to ground (on the side of the cabinet);
• Connect the anti-noise filters delivered with the controller (inserted in the spare parts kit) in
parallel to the brake coil (max 230VDC) and as close as possible to it;
• When a retiring ramp is present, connect the anti-noise diode delivered with the controller (spare
parts kit) in parallel to the retiring ramp coil and as close as possible to it; make sure to connect
the cathode (diode side marked with a white strip) to the power supply positive common
“CAME+” and the anode to the negative “CAME-“;
• For the wiring towards the car, if signals and 24V power supply wires are present in the same
travelling cable, make sure these are kept apart (safety chain circuit, doors or retiring ramp power
supply, 230V etc.).
• For installations with VVVF all the instructions provided by the manufacturer must be fulfilled,
regarding both the filters and the wiring. For a proper operation of the system, it is essential to
use a shielded cable for connections to the motor and to the braking resistor;
• Always avoid placing signal cables in the vicinity of the power cables and / or power supply.
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