Parker AC890PX Series, Product Manual

Page: 98 / 517

Safe Torque Off
4-32
AC890PX AC Drive
STO Function Checking
Two levels of checking are required. A comprehensive check, and a regular check.
It is for the user / machine builder to determine the frequency of these checks based on their knowledge, use
of the machine, appropriate standards and any legal requirements.
DANGER
ALL TESTS MUST PASS. IF ANY TEST FAILS, IT MUST BE INVESTIGATED AND
RECTIFIED BEFORE ATTEMPTING TO PUT THE EQUIPMENT INTO SERVICE.
FURTHER OPERATION OF THE 890 WITHOUT RESOLVING THIS FAILURE IS ENTIRELY
AT THE USER’S OWN RISK. FAILURE TO DO SO 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.
SEE SAFETY CATEGORY DEFINITIONS AND LIMITATIONS, REFER TO EN ISO 13849-
1:2008.
When STO becomes active during any test, power to the motor must be seen by the user to be quenched
instantaneously. Note: the drive should respond in less than 200 milliseconds.
All STO checks should be performed after the 890 has been commissioned for speed control.