Setting Description
Dual Channel Equiv-
alent
The pair of safety output terminals are used as dual channel outputs. The output is ON
if the paired safety output terminals are both normal.
l
Relationship between the Single/Dual Setting and Safety Output Data
The safety output data that is used in the safety program is output to the safety output terminals
according to the Single/Dual parameter as shown below.
•
Relationship between Safety Output Data and Signals Output from Safety Output Terminals for
Single-channel Outputs
Single/Dual
Safety output data
Output signal on the safety output
terminal
Meaning of status
So (x) So (x)
Single Channel 0 0 Inactive (OFF)
1 1 Active (ON)
• Relationship between Safety Output Data and Signals Output from Safety Output Terminals for
Dual-channel Equivalent Outputs
n = Even number
Single/Dual
Safety output data
Output signal on the safety output
terminal
Meaning of status
So (x) So (n) So (n+1)
Dual Channel Equiva-
lent
0 0 (OFF) 0 (OFF) Inactive (OFF)
1 1 (ON) 1 (ON) Active (ON)
• Operation for Single Channel: Normal Operation
I/O indicator (yellow)
I/O indicator (red)
Safety output data
Safety output command value
Safety output terminals
OFF
ON OFF
• Operation for Single Channel: Test Pulse Evaluation Error by Stuck-at-high Error
4 Safety Control Unit Operation
4 - 37
NX-series Safety Control Unit User's Manual (Z930)
4-3 Safety I/O Function
4
4-3-2 Safety Output Function
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