224
YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Item
Description
Failure probability
Less frequent operation
request mode
PFD = 1.38E
-5
Frequent operation
request mode or
continuous mode
PFH = 3.35E
-9
Performance level
The Safe Disable input complies with the performance
level requirements of EN ISO 13849-1.
HFT (hardware fault tolerance)
N = 1
Type of subsystem
Type B
MTTF
D
High
DCavg
Medium
Mission time
10 years
Note:
EDM = External Device Monitoring
PFD = Probability of Failure on Demand
PFH = Probability of Dangerous Failure per Hour
◆
Notes
DANGER
Sudden Movement Hazard. When you use the Safe Disable function in the safety
system of a machine, do a full risk assessment for the system to make sure that all parts of the system
comply with applicable safety standards. Incorrect application of the Safe Disable function can cause
serious injury or death.
DANGER
Sudden Movement Hazard. If the output circuit of the drive is damaged and the
Safe Disable function turns OFF the drive output to a permanent magnet (PM) motor, the motor can rotate
180 electrical degrees. Prevent damage to equipment and injury to personnel during this condition.
Sudden motor movement can cause serious injury or death. It is possible for current to flow through the
motor winding in these conditions.
DANGER
Electrical Shock Hazard. You cannot depend on the Safe Disable function to
prevent electrical shock. Disconnect all power to the drive and wait for the time specified on the warning
label before you remove covers. Check the drive for dangerous voltages before servicing or repair work. If
you do work on the drive when it is energized and there is no cover over the electronic circuits, it can
cause serious injury or death.
WARNING
Sudden Movement Hazard. Although the Safe Disable function is in operation,
gravity or other external forces in the vertical axis can move the motor. Incorrect application of the Safe
Disable function can cause serious injury or death.