Mounting and wiring
EK1122, EK15xx44 Version: 3.4
EtherCAT cable
Fig.35: ZK1090-3131-0xxx
For connecting EtherCAT devices only shielded Ethernet cables that meet the requirements of at least
category 5 (CAT5) according to EN 50173 or ISO/IEC 11801 should be used.
Recommendations about cabling
You may get detailed recommendations about cabling EtherCAT from the documentation "Recom-
mendations for the design of the infrastructure for EtherCAT/Ethernet", that is available for down-
load at www.Beckhoff.com.
EtherCAT uses 4 wires for signal transfer.
Due to automatic cable detection (auto-crossing) symmetric (1:1) or cross-over cables can be used between
EtherCAT devices from Beckhoff.
M8 Connector pin assignment
Signal Description Pin (M8)
Tx+ Transmit Data+ 1
Tx- Transmit Data- 4
Rx+ Receive Data+ 2
Rx- Receive Data- 3
Shield Shielding Housing
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