Ethercat Terminal Descriptions; Module Grounding And Emc - Control Techniques Nidec SI-EtherCAT User Manual

4.2 SI-EtherCAT terminal descriptions
The SI-EtherCAT module has two RJ45 Ethernet ports for the EtherCAT network.
Figure 4-1 SI-EtherCAT connections
Table 4-1 EtherCAT terminal descriptions
Pin
1
2
3
4
5
6
7
8
4.3

Module grounding and EMC

SI-EtherCAT is supplied with a grounding tab on the module that should be connected to the
closest possible grounding point using the minimum length of cable. This will greatly improve the
noise immunity of the module.
It is recommended that the Ethernet cable should be of the shielded type, and connectors should
be shielded with a metal body. Tie-wrapping of the Ethernet cable's shield to the grounding bracket
of the drive is necessary.
At least one EMC Ferrite inductor should be installed near to each communication port of the SI-
EtherCAT module.
At least one EMC Ferrite inductor is necessary near the Master's (PC / PLC) EtherCAT Port. Proper
grounding of the EtherCAT cable's shield near the Master (PC / PLC) is necessary.
SI-EtherCAT User Guide
Ground
tab
EtherCAT
Port A
A - IN
Transmit +
Transmit -
Receive +
Not used
Not used
Receive -
Not used
Not used
EtherCAT
Port B
Pin
1 Transmit +
2
3
4
5
6
7
8
Link LEDs
B - OUT
Transmit -
Receive +
Not used
Not used
Receive -
Not used
Not used
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