EJ8xxx - Signal-Distribution-Board for standard EtherCAT plug-in modules

EMC guidelines

EMC stability can be improved by the following points:

Covering of signal lines from both sides with SGND can improve insensibility against EMC disturbances. Additionally the space between signal lines and signal groups should be filled with copper on SGND potential.
Keep Us power supply as close as possible to the EJ1100 coupler in order to avoid unnecessary antennas.
SGND connection to the control cabinet shall be implemented as metal bolts building a direct connection between back plane and control cabinet. A cable based SGND connection to the control cabinet shall be avoided.