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Safety input terminals
Safety input data
I/O indicator (yellow)
I/O indicator (red)
*1. This is the time that the error status (control data, status data, and indicator status) is held (1 s min.).
• Operation for Dual-channel Equivalent Inputs: Normal Operation
Safety input data 0 before dual evaluation
Safety input data 1 before dual evaluation
• Operation for Dual-channel Equivalent Inputs: Discrepancy Error
NX-series Safety Control Unit User's Manual (Z930)
Error
OFF
ON
detected
Safety input terminal 0
Safety input terminal 1
Discrepancy time
Safety input data 0
I/O indicator (yellow) 0
I/O indicator (yellow) 1
I/O indicator (red) 0
I/O indicator (red) 1
4 Safety Control Unit Operation
Cause of error
OFF
removed
*1
OFF
ON
OFF
ON
OFF
OFF
Discrepancy
time
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4
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Table of Contents
Troubleshooting
