Graphic Operator Terminal /
INSTALLATION TIPS
6.3
Achieving EMC Protection
The following suggestions should be taken into consideration to achieve better EMC protection:
Initially, use the original cabling from Kollmorgen primarily.
Use shielded cables for RS232 communication.
Use twisted pair and shielded cabling for RS422 and RS485.
Use the cabling intended for the bus type; Ethernet, Profibus, CC-Link, CAN, Device Net etc.
Install and connect according to applicable specifications for the relevant bus standard.
Use shielded cabling for Ethernet, preferably with foil + braided shield.
D-sub covers should be shielded and the shield should be connected to the cover 360 °
where the cable comes in.
Connect the shield at both ends.
With longer distances, there is a risk that the ground potential may be different. In this scenario,
the shield should only be connected at one end. A preferred alternative is to connect the other
end of the shield to the ground via a 0.1 uF/250 V plastic capacitor. Both ends are then
connected to the ground in terms of HF, but only connected to the ground at one end in terms of
LF, thus avoiding the 50 Hz grounding loops.
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