M Series AC Servo
User Manual
56
Rev. 1.0
7/31/2019
400-820-9661
4.9.2.3 STO Signal Denition
Signal Symbol Pin Description Control Mode
Safety Input SF1
SF1+ 1
When SF1 has no input signal, e.g.
the port is disconnected, SF1 will be
considered OFF. The upper half of the
internal power transistor will be shut off.
Compatible with all control
modes
SF1- 5
Safety Input SF2
SF2+ 3
When SF2 has no signal input, e.g.
the port is disconnected, SF2 will be
considered OFF. The upper half of the
internal power transistor will be shut off.
SF2- 2
Safety Output
EDM+ 6
Output monitor signal used to check the
safety function.
EDM- 4
Ground DGND 7, 8
+5VDC power ground
+5V power +5V 9, 10
+5VDC power supply
4.9.2.4 STO Connection Diagrams
Connection to safety switch
Safety Switch
M2 Servo Drive
Safety Input 1
Safety Input 2
Safety Output
24VDC
0VDC
Safety light curtain connection
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