PM8M22 Output expansion card

To meet the conducted EMC requirements an external line filter is necessary. It is the responsibility of the customer to choose appropriate filtering for their application, Pacific Scientific is willing to assist in this choice. The CE test setup included a 50CE4 line filter manufactured by MTE. CE testing was performed using 50 m motor and resolver cables, the maximum lengths specified, to prove worst case conducted emissions compliance. For CE testing with 50 m cables, a motor cable balun was added to the motor wiring (Pacific Scientific # 104-090003-01). The line filter should be mounted as close as possible to the drive. To provide maximum high frequency filtering remove any paint from between the filter, the drive and the conductive surface, ground plane they are bonded to.

Shielding & Grounding 

To meet radiated EMC requirements the serial, Command I/O, motor and resolver cables should be shielded and grounded at the drive end. To guarantee maximum high frequency radiated noise reduction, the shields should have 360 degree termination to ground. Clamp the exposed portion of the shields to the front of the drive with the clamp supplied to terminate. The serial and command I/O cables can be terminated to ground through the D-sub connector if it provides 360 degree shield termination. It may also be necessary to add ferrites to the Command I/O and serial cables. Once again it is important to remove the paint from any grounding surfaces. To avoid the risk of crosstalk, the motor and resolver cables should be kept away from sensitive signal cables such as telephone and intercommunication lines.

Need for Regen 

The clearest indication that an external regen resistor is needed is that the drive will fault on over-voltage when the motor decelerates. The Fault LED will be solid on and the variable FaultCode will show ‘over-voltage’ or ‘external regen fault’.An estimated 10% of applications will require that the PC800 be equipped with a regen resistor

                                                                        

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