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System Configuration Section 1-2
1-2-2 Example System Configurations
The following examples illustrate safety control systems using NE1A-series
Controllers.
• Safety Control System with an NE1A-series Safety Master
• System Combining an NE1A- series Safety Control System and a Stan-
dard PLC Monitoring Control System
• System Combining a Distributed Safety Control System with Multiple
NE1A-series Controllers and a Centralized Monitoring System Using
Standard PLCs
• Standalone NE1A-series Controller System
• Connection with a Network Configurator
Safety Control System with an NE1A-series Safety Master
This system uses the NE1A-series Controller as a Safety Master and estab-
lishes a Safety Remote I/O System with Safety Slaves.
The Pre-Ver. 1.0 Controllers can perform safety I/O communications as a
Safety Master for a maximum of 16 connections (16 Slaves) with up to 16
bytes per connection.
Controllers with unit version 1.0 or later can perform safety I/O communica-
tions as a Safety Master for a maximum of 32 connections (32 Slaves) with up
to 16 bytes per connection.
The NE1A-series Controllers support two protocols, single cast and multicast
(broadcast), for safety I/O connections.
NE1A
Safety Master
DST1 Safety Slave
Safety connections (logic communications paths)
Either singlecast or multicast
16 connections maximum
32 connections maximum (unit version 1.0 or later
Safety Slave by other
manufacturer
Safety Slave by other
manufacturer
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