Table of Contents
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1-1
Overview
1-1-1
About the DST1-series Safety I/O Terminals
The DST1-series Safety I/O Terminals support the DeviceNet Safety protocol and provide various functions
for the Safety System. The DST1-series Safety I/O Terminals allow the user to construct a safety control/
network system that meets the requirements for Safety Integrity Level (SIL) 3 according to IEC 61508 (Func-
tional Safety of Electrical/Electronic/ Programmable Electronic Safety-related Systems) and the require-
ments for Safety Category 4 according to EN 954-1.
The DST1-series Safety I/O Terminal's safety I/O data is transmitted through safety I/O communications con-
forming to the DeviceNet Safety Protocol, and the data processing is performed in conducted in the Safety
Network Controller (NE1A-SCPU01). Also, the status of the safety I/O data can be monitored in a standard
PLC in an existing DeviceNet network using standard I/O communications or explicit message communica-
tions.Dual Channel Complementary
DST1-series
Safety I/O Terminal
Emergency Stop
Button
1-1-2
DST1-series Safety I/O Terminals Features
Safety Inputs
•
Semiconductor output devices such light curtains can be connected as well as contact output devices
such as emergency stop switches.
•
Faults in external wiring can be detected.
•
Input delays (ON delays and OFF delays) can be set.
•
Pairs of related local inputs can be set to Dual Channel Mode in order to be compliant with the Category
4 standards.
When Dual Channel Mode is set, the input data patterns and the time discrepancy between input sig-
nals can be evaluated.
Test Outputs
•
4 independent test outputs are available to use.
•
A disconnected external indicator lamp can be detected. (Can be set for the T3 Terminal only.)
•
Test outputs can be used as power supply terminals to devices such as sensors.
•
Test outputs can be used as the standard output terminals for monitor outputs.
Safety Outputs
Semiconductor Outputs
•
Pairs of related local outputs can be set to Dual Channel Mode in order to be compliant with the Cate-
gory 4 standards.
•
When Dual Channel Mode is set, the output data patterns can be evaluated.
•
The rated output current is 0.5 A max. per output.
20
Network Configurator
DeviceNet Network
Two-hand Switch
Safety Door Switch
Safety Limit Switch
Safety Network Controller
DST1-series
Safety I/O Terminal
Enable Switch
Safety Light Curtain
PLC
DeviceNet Master
Contactor
Safety Relay
Valve
Safety Relay Unit
Section 1: Overview
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Table of Contents
Troubleshooting
