Omron NX-SID800

1 Overview
1 - 6
NX-series Safety Control Unit User’s Manual (Z930)
1-2 System Configuration and Configura-
tion Devices
The safety control system operates on the EtherCAT network.
You combine the EtherCAT Master Function Module in the NJ/NX-series CPU Unit with the EtherCAT
slave functionality in an NX-series EtherCAT Coupler Unit to build a safety control system.
The Safety CPU Unit serves as the FSoE master to control Safety I/O Units that serve as FSoE slaves.
*1
As shown in the above figure, the Safety CPU Unit can be used to control not only the Safety I/O Units that
are mounted to the same EtherCAT Slave Terminal, but also it can control Safety I/O Units that are mounted
to other EtherCAT Slave Terminals through the EtherCAT network. You can use only one Safety CPU Unit on
each EtherCAT network.
*1. The connectivity of FSoE communications has been confirmed between OMRON NX-series Safety Control
Units. Preparations for the Safety over EtherCAT Test Center were underway by the EtherCAT Technology
Group as of September 2013.
1-2-1 Safety Control System Configuration on EtherCAT
Slave Terminal
The Safety CPU Unit performs
safety process data communica-
tions with the Safety I/O Units.
Slave Terminal
Safety CPU Unit
NJ/NX-series
CPU Unit
Coupler
Unit
Safety control system
NJ/NX-series EtherCAT Communications System
EtherCAT master
Abbreviations used in this figure:
• Coupler Unit: EtherCAT Coupler Unit
• Safety Input: Safety Input Unit
• Safety Output: Safety Output Unit
(These abbreviations apply to all figures in this manual.)
Safety Output
Safety Input
Safety Output
Safety Input
Coupler
Unit
Coupler
Unit
EtherCAT