Safety Network Controller Overview; About The Ne1A-Series Safety Network Controllers - Omron DEVICENET SAFETY - SYSTEM CONFIGURATION 07-2009 System Configuration Manual

Safety Network Controller Overview

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Safety Network Controller Overview

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About the NE1A-series Safety Network Controllers

The NE1A-series Safety Network Controllers provide various functions, such
as safety logic operations, safety I/O controls, and a DeviceNet Safety proto-
col. The NE1A-series Controllers allow the user to construct a safety control/
network system that meets the requirements for Safety Integrity Level (SIL) 3
according to IEC 61508 (Functional Safety of Electrical/Electronic/ Program-
mable Electronic Safety-related Systems) and the requirements for Safety
Category 4 according to EN 954-1.
In the example system shown below, the safety control system implemented
with the NE1A-series Controller and the monitoring system implemented with
the standard PLC are realized on the same network.
• As a Safety Logic Controller, the NE1A-series Controller executes safety
logic operations and controls local I/O.
• As a Safety Master, the NE1A-series Controller controls the remote I/O of
Safety Slaves.
• As a Standard Slave, the NE1A-series Controller communicates with the
Standard Master.
Safety Logic Operations
and Safety I/O Control
PLC
DeviceNet Standard Master
DeviceNet
Standard Slave
Non-safety-related Control
The NE1A PLC system monitors the
SNC (i.e., the safety control system)
using DeviceNet I/O communications
and explicit messages.
Section 1-2
Network Configurator
SNC
DRT1-series
DeviceNet Safety Slave
Safety-related Control
The DeviceNet Safety
System controls remote I/O.
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