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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
3-3-1 Safety Input Functions
Precautions for Correct Use
• The maximum number of connections per Unit is as follows:
NX-SIH400: 5 (5 connected in series × 1 series)
• You can connect up to five Safety Edges to the two test output terminals.
• You cannot branch the connections to more than one Safety Edge or Safety Mat from the
same test output terminal.
• Safety Edges can be connected only with two wires on each side (no terminating resistance).
You cannot connect terminating resistance.
• The total wiring length (L1 + L2 +…+ Ln+1 in the figure above) for the SGE Safety Edges is
100 m max.
• The SGE Safety Edge can be used in a Safety Category 3 or lower or a PLd or lower applica-
tion. It cannot be used in a Safety Category 4 or PLe application.
Safety Edges
Si0
Si1
T0
NX-SIH400
T1
Si3
Si2
Blue
Brown
Blue
Brown
Blue
Brown
Blue
Brown
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