User Manual Of EL7-EC** AC Servo
39
2.8 CN3/CN4 EtherCAT Communication Port
CN3 and CN4 are communication ports for EtherCAT protocol. LAN cable from master
device will be connected to CN3 (IN) and CN4 (OUT) will be connected to the next slave
device.
Port
Pin
Signal
Description
1, 9
E_TX+
EtherCAT Data sending
positive terminal
2, 10
E_TX-
EtherCAT Data sending
negative terminal
3, 11
E_RX+
EtherCAT Data receiving
positive terminal
4, 12
--
--
5, 13
--
--
6, 14
E_RX-
EtherCAT Data receiving
negative terminal
7, 15
--
--
8, 16
--
--
Frame
PE
Shielded ground
Example of EtherCAT communication cable connections between master and slave
devices