Precautions For Safety Functions - YASKAWA SGD7S-1R9D Product Manual

11.1.2

Precautions for Safety Functions

 To confirm that the HWBB function satisfies the safety requirements of the system, you
must conduct a risk assessment of the system.
Incorrect use of the safety function may cause injury.
 The Servomotor will move if there is an external force (e.g., gravity on a vertical axis) even
when the HWBB function is operating. Use a separate means, such as a mechanical brake,
that satisfies the safety requirements.
Incorrect use of the safety function may cause injury.
 While the HWBB function is operating, the motor may move within an electric angle of 180°
or less as a result of a SERVOPACK failure. Use the HWBB function for an application only
after confirming that movement of the motor will not result in a hazardous condition.
Incorrect use of the safety function may cause injury.
 The dynamic brake and the brake signal are not safety-related elements. You must design
the system so that SERVOPACK failures will not cause a hazardous condition while the
HWBB function is operating.
Incorrect use of the safety function may cause injury.
 Connect devices that satisfy the safety standards for the signals for safety functions.
Incorrect use of the safety function may cause injury.
 The HWBB function does not shut OFF the power to the SERVOPACK or electrically isolate
it. Implement measures to shut OFF the power supply to the SERVOPACK before you per-
form maintenance on it.
There is a risk of electric shock.
 Use an SELV-compliant power supply according to EN/IEC 60950-1 to input 24 VDC to the
control power supply input terminals.
If you use a power supply that is not SELV compliant, safety functions may be lost if the power
supply fails, which may result in machine damage or injury.
11.1 Introduction to the Safety Functions

11.1.2 Precautions for Safety Functions

WARNING
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