Moons' M2DV-1D82D - STO Connector; Safety Precautions; STO Input;Output Signals; STO Internal Circuit Diagram

M Series AC Servo
User Manual
55
Rev. 1.1
9/13/2021
400-820-9661
4.9 STO Connector
On the M2AC series servo drives, the STO (Safe Torque O󰀨) function is connected via port CN5. The STO
function shuts o󰀨 the motor current turning o󰀨 the motor output torque by forcibly turning o󰀨 the signal of
the servo driver power transistor. This is done internally through the STO Input/Output signal circuit.
4.9.1 Safety Precautions
• If the STO function does not trigger, make sure the STO connector is plugged into CN5 on the drive
correctly.
• When using the STO function, perform an equipment risk assessment to ensure that the system
conforms to the safety requirements.
• Even when the STO function is enabled, the servo motor may move due to external force (e.g.
gravitational force on the vertical axis). Make sure a holding brake is used in applications where this is
possible.
• When the STO function engages and removes the torque, the motor will be
“
free running
”
, requiring
more distance until the motion stops. Make sure this will not be a safety issue.
• When the STO function operates, it will turn o󰀨 the current to the motor, but it does not turn o󰀨 the
power to the servo drive. Make sure to disconnect the power to the drive before performing any
maintenance on it.
• After the STO function is triggered, the drive will have a fault alarm status(Alarm code:
), and
the motor will be disabled.
• After the STO signal return to normal, the drive will automatically clear the STO fault alarm, but the
motor will remain disabled . To restore the system to normal operation, re-enable is needed.
4.9.2 STO Input/Output Signals
4.9.2.1 STO Internal Circuit Diagram
SF1+
SF1-
SF2+
SF2-
EDM+
EDM-
1.5K
1.5K
4.9.2.2 CN5 Connector diagram
Item Part number Vendor
Housing 43025-1000 Molex
Crimp 43030-0005 Molex