M Series AC Servo
User Manual
170
Rev. 1.0
7/31/2019
400-820-9661
11.2. The implementation of Safety Functional
11.2.1 Safety Functional Specication
During the normally operation, if inspection the violation of limits, the STO off, the drive give alarm signal.
11.2.1.1 Safety input Signal
STO Safety input Signal as following:
Signal Symbol Pin No. contents Control mode
Safety input 1
SF1+ 1
When SF1 input turns off, the STO
function activate
Compatible all control
mode
SF- 2
Safety input 2
SF1+ 3
When SF2 input turns off, the STO
function activate
SF- 5
Note: When safety input SF1 or SF2 is OFF, STO function activate.
11.2.1.2 External device monitor (EDM)output signal
The monitor output signal is used by the external device to monitor the state of the safety input signal.
Connect the monitor output to the external device monitor terminal of the safety devices such as safety
controller and safety sensor.
Signal Symbol Pin No. contents Control mode
EDM Output
EDM+ 6
When STO function work
，
The monitor
output signal EDM may used
Compatible all control
mode
EDM- 4
11.2.1.2 +5VDC Source
STO Terminal block is kit, if the STO unused, keep the STO terminal block connect the STO port, The
SF1, SF2 connect the internal +5VDC and DGND:
Signal Symbol Pin No. contents Control mode
Digit DGND 7,8 DGND
Compatible all control mode
+5V +5VDC 9,10 +5VDC output
11.2.2 The fault reaction function
The safe torque off (STO) function is a safety function that shuts the motor current and turns off motor
output torque by forcibly turning off the driving signal of the servo driver internal power transistor
11.2.3 Response time
The response time of each safety related function and of the associated fault reaction function, should
accord with the timing chart as following:
11.2.3.1 Operating timing chart for safety status
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