A-3
Application Examples
These examples show safety systems that use Safety Control Unit.
Refer to the NX-series Safety Control Unit Instructions Reference Manual (Cat. No. Z931) for details
on the instructions that are used in each example.
A-3-1
Emergency Stop Pushbutton Switches
Application Overview
Safety category/PL Safety device Stop category Reset
Equivalent to 4/PLe Emergency stop pushbutton 0 Manual
Motor M stops when emergency stop pushbutton S1 is pressed.
Wiring
KM1 KM2
M
KM1
KM2
KM1
KM2
S1
S2
Si0
Si1
Si2
Si3
T0
T1 T0
T1
So0
So1
So2
So3
IOG
Unit 2 (NX-SIH400) Unit 3 (NX-SOD400)
S1: Emergency stop pushbutton
S2: Reset switch
KM1, KM2: Contactors
M: Motor
IOG IOG IOG
Appendices
A - 30
NX-series Safety Control Unit User's Manual (Z930)