Appendix
A - 72
NX-series Safety Control Unit User’s Manual (Z930)
A-7-2 Contact Icons for Input Devices
Category Device Settable contact icons
Safety Switch Emergency stop switch for dual channel
equivalent input
2NC
Emergency stop switch for single chan-
nel
1NC
Safety door switch for dual channel
equivalent input
2NC 2NO
Safety door switch for dual channel com-
plementary input
1NC/1NO 1NO/1NC
Safety door switch for single channel
1NC 1NO
Safety limit switch for dual channel
equivalent input
2NC 2NO
Safety limit switch for dual channel com-
plementary input
1NC/1NO 1NO/1NC
Safety limit switch for single channel
1NC 1NO
Two-hand switches
1NO/1NC 1NC/1NO
Safety key selector switch for dual chan-
nel equivalent input
2NC 2NO
Safety key selector switch for dual chan-
nel complementary input
1NC/1NO 1NO/1NC