Parker AC890PX Series, Product Manual

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Safe Torque Off
4-28
AC890PX AC Drive
To start the drive:
Ensure the Safety Demand switch is reset (contacts closed).. Press the RESET button to ensure the
Safety Control Unit is reset; its contacts to the 890 should close making the STO function inactive,
the 890 STO output should then turn OFF. Then press the DRIVE START button.
To perform operational stop (non STO):
Press the DRIVE STOP button.
Wait for the motor to come to rest.
To invoke STO:
Press the DRIVE STOP button.
Wait for the motor to come to rest.
Operate the Safety Demand contacts open) that causes the safety control unit to open its output
contacts together. In response, the drive will confirm, by energising KA1 via X11/05, that STO has
been invoked. The user may wish / require that this is verified by mechanisms not shown on this
drawing.
DANGER
IF KA1 IS DE-ENERGISED, DO NOT ACCESS THE MACHINE AS A FAULT MAY BE PRESENT.
THE USER MUST RESOLVE THE DETECTED FAULT BEFORE USING THE STO FEATURE.
FAILURE TO DO SO COULD RESULT IN STO NOT BEING ACHIEVABLE, AND THUS THE
MOTOR MAY ROTATE UNEXPECTEDLY AND COULD RESULT IN INJURY, DEATH OR
DAMAGE.
PARKER HANNIFIN MANUFACTURING WILL NOT ACCEPT ANY LIABILITY FOR
FAILURE TO DO THIS OR FOR ANY CONSEQUENTIAL LOSS OR DAMAGE.
Note: if either channel of the Safety Demand is requested while the motor is rotating, the motor will
coast to rest unless external forces act on it.