DOC-0017-07-EN: AC20 Series - EtherCAT Option 
  DOC-0017-07-EN-B 04.04.2023   13 (58) 
7  Network  
7.1  Network Connector and Cable Specification  
Two RJ45 Ethernet sockets are provided. The IN socket is connected to the master or the preceding slave 
coming from the direction of the master. The OUT socket is connected to the IN socket of the next slave, if 
there is one. The last OUT socket is Not connected 
 
Ethernet Connector (RJ45) 
 
 
Normally left unused; to ensure signal integrity, these pins are 
tied together and terminated to PE via a filter circuit in module. 
Normally left unused; to ensure signal integrity, these pins are 
tied together and terminated to PE via a filter circuit in module. 
 
Cable 
 
For connecting EtherCAT devices only Ethernet cables that meet at least the requirements of category 5 
(CAT5) according to EN 50173 or ISO/IEC 11801 should be used. EtherCAT uses 4 wires for signal 
transfer.       
Only use cables terminated with RJ45 plugs. The cable length between two EtherCAT devices must not 
exceed 100m. 
. 
Wiring Example