MOTOROLA MVME323-1 Remote control card

Grounding Shields for Safety and Low Emissions/Susceptibility Dangerous voltages, resulting from cable capacitance, exists on some cable shields if the shields are not connected to PE ground. Proper grounding of shields is also required to reduce radiated and conducted emissions as well as to protect against susceptibility to external and self generated noise. Follow these shielding requirements carefully: The drive end of the motor cable shield must be connected to the PE or location on the TB1 connector

The shield must also be clamped to the ground plane as described above.

 If cable with a separate inner foil shield and outer braided shield is used (Pacific Scientific CE cables for example), connect the foil shield to the PE or location on the TB1 connector and clamp the outer braided shield to the ground plane. If the leads for a motor holding brake are run with the motor leads, the holding brake leads must be separately shielded and the shield connected to the PE or location on the TB1 connector. The resolver cable should have inner shields around each twisted pair as well as an overall outer braided shield. The inner shields should be connected to J3 pin 5 while the outer shield should be clamped to the ground plane. The control leads to the J2 connector should have an outer braided shield with the shield terminated through a conductive shell or clamped to the ground plane. When using an external regen resistor, if regen cabling is accessible during normal machine operation, regen resistor cable should be rated at 450 VDC and shielded with shield connected to PE. Sensitive cables such as telephone lines shold be separated/isolated from motor and resolver cables.

                                                                        

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