YASKAWA Sigma-7 SGD7S Series - 12.2.2 Precautions for Safety Functions; 12.3 Hard Wire Base Block (HWBB and SBB); 12.3.1 Overview

Refer to the following section for information on the safety function and safety parame-
ters.
Ä Chap. 1.7 ‘Compliance with UL Standards, EU Directives, and Other Safety Standards’
page 38
Products that display the TÜV mark on the nameplate have met the
safety standards.
12.2.2 Precautions for Safety Functions
WARNING!
– 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 Servomotor 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 con-
firming that movement of the Servomotor will not result in a haz-
ardous condition.
Incorrect use of the safety function may cause injury.
– The dynamic brake and the brake signal are not safety-related ele-
ments. You must design the system so that SERVOPACK failures will
not cause a hazardous condition while the HWBB function is oper-
ating.
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 SERVO-
PACK or electrically isolate it. Implement measures to shut OFF the
power supply to the SERVOPACK before you perform maintenance
on it.
There is a risk of electric shock.
12.3 Hard Wire Base Block (HWBB and SBB)
12.3.1 Overview
A hard wire base block (abbreviated as HWBB) is a safety function that is designed to
shut OFF the current to the motor with a hardwired circuit.
The drive signals to the Power Module that controls the motor current are controlled by
the circuits that are independently connected to the two input signal channels to turn OFF
the Power Module and shut OFF the motor current.
Sigma-7 Series SERVOPACKs
Safety Functions
Hard Wire Base Block (HWBB and SBB) > Overview
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