11 Appendix
Page
86
Installation manual PMCprimo Drive2
11 Appendix
11.1
Notes on EMC problems
This chapter will give you useful information to avoid EMC problems when installing the PMCprimo
Drive2.
Especially when using long motor cable (>25m) the noise immunity will increase.
11.1.1 Cable
screening
•
Run as many as possible of the cables that are connected to the equipment as screened
cables
•
Make a wide-area grounding (earth) of the screen at both ends. The screen braid should
provide at least 85% coverage
•
Ground any unused cores of the motor cable to the PE at both ends
•
Route all control, bus and signal cables with at least 20 cm separation from the screened motor
cable
•
Route all the cables inside the switchgear cabinet as close as possible to the reference ground
- cables in free air act simultaneously as transmitting and receiving antennae
The cables listed below must be screened. Screen terminal clamps must be installed as close to
the equipment as possible
Cable
Screening
Resolver
Connect the screen to the connectors at both ends
Motor cable/
Brake cable
Connect the screen to the connector or PG screw gland on the motor,
and to ground at the PMCprimo Drive 2 end
Ballast cable
Connect the screen to the PG screw gland on the external ballast
resistor, to ground at the PMCprimo Drive 2 end
Power supply cable
No screen required (built in filter)
24 V cable
No screen required (built in filter)
Analog signals
Connect the screen to the analog reference ground at the PLC, to
ground at the PMCprimo Drive2 end
Digital signals
No screen required
Master encoder
signals
Connect the screen to the connectors at both ends
CAN bus
Connect the to the connectors at both ends
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