Application Overview
Safety category/PL Safety device Stop category Reset
Equivalent to 3/PLd Emergency stop pushbutton 0 (STO) Manual
All servomotors M stop when emergency stop pushbutton S1 is pressed.
Wiring
M M
Unit2 (NX-SIH400) Unit3 (NX-SOD400)
S1: Emergency stop pushbutton
S2: Reset switch
D1, D2, D3, and D4: Servo drives
M: Motor
So0 So1
IOG IOG
So2 So3
IOG IOG
S1
D1 D2 D3 D4
S2
Si0 Si1 Si2 Si3
T0 T1 T0 T1
M
EDM+
M
SF1+
SF1
−
SF2+
SF2
−
SF1+
SF1
−
SF2+
SF2
−
SF1+
SF1
−
SF2+
SF2
−
SF1+
SF1
−
SF2+
SF2
−
EDM+
EDM−
EDM+
EDM−
EDM+
EDM−EDM−
Appendices
A - 67
NX-series Safety Control Unit User's Manual (Z930)
A-3 Application Examples
A
A-3-12 Multi-axis Servo Drives (STO)