Hard Wire Base Block (Hwbb) - YASKAWA SGD7S Product Manual

11.2

Hard Wire Base Block (HWBB)

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 cir-
cuits that are independently connected to the two input signal channels to turn OFF the Power
Module and shut OFF the motor current.
For safety function signal connections, the input signal is the 0-V common and the output signal
is a source output.
This is opposite to other signals described in this manual.
Important
To avoid confusion, the ON and OFF status of signals for the safety function are defined as fol-
lows:
ON: The state in which the relay contacts are closed or the transistor is ON and current flows
into the signal line.
OFF: The state in which the relay contacts are open or the transistor is OFF and no current
flows into the signal line.
The input signal uses the 0-V common. The following figure shows a connection example.
24-V power supply
Switch
Fuse
0 V
SERVOPACK
CN8
/HWBB1+ 4
/HWBB1-
3
/HWBB2+
/HWBB2-
5

11.2 Hard Wire Base Block (HWBB)

Power supply
Control circuit
Stopped.
Stopped.
Power Module
Motor
11
11-3