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3 Part Names and Functions
NX-series Safety Control Unit User’s Manual (Z930)
3-3 Safety I/O Functions
3
3-3-2 Safety Output Functions
Single/Dual
Set the evaluation method to use with the safety output terminals.
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
• Relationship between Safety Output Data and Signals Output from Safety Output Terminals for
Dual-channel Equivalent Outputs
n = Even number
• Operation for Single Channel: Normal Operation
Setting Description
Single Channel The safety output terminals are used as independent safety
output terminals.
Dual Channel Equivalent The pair of safety output terminals are used as dual-channel
outputs. The output is ON if the paired safety output termi-
nals are both normal.
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)
Single/Dual
Safety output data
Output signal on the
safety output terminal
Meaning of status
So (x) So (n) So (n+1)
Dual Channel Equivalent 0 0 (OFF) 0 (OFF) Inactive (OFF)
1 1 (ON) 1 (ON) Active (ON)
Safety output data
I/O indicator (yellow)
Safety output command value
I/O indicator (red)
Safety output terminal
OFF ON OFF
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