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Mounting and wiring
EK1122, EK15xx
44
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