Omron NX-SL3300 User Manual page 572

Appendices
l I/O Map Settings
Program
Precautions for Safe Use
• Test the functionality every six months to detect welded contactor contacts.
• The customer is responsible for attaining conformance of the entire system to standards.
• To detect electrical and mechanical failures, use a combination of redundant semiconductor
output contacts and redundant mechanical output devices.
A - 60
NX-series Safety Control Unit User's Manual (Z930)