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1 Features and System Configuration
NX-series Position Interface Units User’s Manual (W524)
1-2 System Configuration
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1-2 System Configuration
You can mount NX-series Position Interface Units after an EtherCAT Coupler Unit, the Communications
Coupler Unit, in an EtherCAT Slave Terminal.
This allows you to connect to a controller that provides an EtherCAT master.
The system configuration and the functions of the Position Interface Units that you can use depend on
the controller that you connect to and the EtherCAT master specifications.
This section describes differences in the system configuration.
Refer to the following sections for details on the differences in functions based on different controller
specifications: 6-6-5 Differences in I/O Refreshing Methods Based on the Controller on page 6-29,
7-6-5 Differences in I/O Refreshing Methods Based on the Controller on page 7-21, and 8-7-4 Differ-
ences in I/O Refreshing Methods Based on the Controller on page 8-28.
Refer to the NX-series EtherNet/IP Coupler Units User’s Manual (Cat. No. W536) for information on
connections to EtherNet/IP Coupler Units.
Slave Terminals
Slave Terminal is a generic name for a building block-type remote I/O terminal that contains a
group of NX Units connected to a Communications Coupler Unit.
An EtherCAT Slave Terminal is the term when an EtherCAT Coupler Unit is used as the Com-
munications Coupler Unit.
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