7 Wiring
7 - 4
NX-series EtherCAT Coupler Unit User’s Manual (W519)
Sizes and Conductor Pairs: AWG 22 × 2 Pairs
*1. We recommend that you use combinations of the above Cables and Connectors.
Precautions for Correct Use
• The maximum length between nodes is 100 m. However, some cables are specified for less
than 100 m. Generally speaking, if the conductors are twisted wire rather than solid wire,
transmission performance will be lower, and reliable communications may not be possible at
100 m. Confirm details with the cable manufacturer.
• When selecting a connector, confirm that it is applicable to the cable that will be used. Con-
firm the following items: Conductor size, conductor type (solid wire or twisted wire), number
of twisted pairs (2 or 4), outer diameter, etc.
The pin arrangement of the EtherCAT communications connectors is given below.
Part name Manufacturer Model
Cables Kuramo Electric Co., Ltd.
KETH-PSB-OMR
*1
Nihon Electric Wire & Cable Co., Ltd.
PNET/B
*1
RJ45 Assembly Connectors OMRON Corporation
XS6G-T421-1
*1
7-1-3 Pin Arrangement of Communications Connectors on the
EtherCAT Coupler Unit
Pin No. Signal name Abbreviation
1 Send data + TD+
2 Send data − TD−
3 Receive data + RD+
4 Not used − ---
5 Not used − ---
6 Receive data − RD−
7 Not used − ---
8 Not used − ---
Communications
connectors
1
8
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