1 Overview
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NX-series Safety Control Unit User’s Manual (Z930)
The safety control system operates in the Slave Terminals of the EtherNet/IP Coupler Units.
You can control Safety I/O Units that are mounted to the same Slave Terminal as the Safety CPU Unit.
You cannot use the EtherNet/IP network to control the operation of Safety I/O Units that are mounted to
other Slave Terminals. You can use only one Safety CPU Unit on each Slave Terminal.
Applicable NX-series EtherNet/IP Coupler Units
Refer to A-15 Version Information on page A-87 for the model numbers and unit versions of the
applicable NX-series EtherNet/IP Coupler Units.
The following table lists the NX-series Safety Control Units that are available.
Refer to Section 2 Specifications for details on individual Units.
1-2-2 Safety Control System Configuration on EtherNet/IP
1-2-3 Types of Safety Control Units
Unit type Outline
Safety CPU Unit This Unit has safety control functions.
It operates as an NX Unit.
It also operates as an FSoE master.
Safety I/O Units These Units have safety input functions or safety output functions.
They operate as NX Units.
These Units operate as FSoE slaves.
Safety Input Units These Units have safety input functions.
Safety Output Units These Units have safety output functions.
Safety
CPU
Unit
Coupler
Unit
Coupler
Unit
Safety Control System
Safety Control System in EtherNet/IP Slave Terminals
Slave Terminal Slave Terminal
Safety Output
Safety Input
Safety Output
Safety Input
Safety
CPU
Unit
Coupler
Unit
The Safety CPU Unit
performs safety process data
communications with the
Safety I/O Units in the Slave
Terminals.
Standard
CPU Unit