Yaskawa SGDB - Manual (Page 139)

3.7 Forming a Protective Sequence
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3.7 Forming a Protective Sequence
This section describes how to use I/O signals from the SERVOPACK to form a protective se-
quence for safety purposes.
3.7.1 Using Servo Alarm Output and Alarm Code Output
J Basic Wiring for Alarm Output Signals
Photocoupler Output
Per output:
Maximum operation
voltage: 30 VDC
Maximum output
current: 50 mADC
Open Collector Output
Per output:
Maximum operation
voltage: 30 VDC
Maximum output
current: 20 mADC
SGDB SERVOPACK
Photocoupler
I/O Power
supply
Host controller
Provide an external I/O power supply separately. There is no DC power available from
SERVOPACK for output signals.
J Contact Output Signal ALM
Output → ALM+ 1CN-31
Servo Alarm Output For Speed/Torque
Control and
Position Control
Output → ALM− 1CN-32
Signal Ground for Servo
Alarm Output
For Speed/Torque
Control and
Position Control
Signal ALM is output when the SERVOPACK de-
tects an alarm.
Design the external circuit so that the main circuit
power to the SGDB SERVOPACK is turned OFF
by this alarm output signal.
ON
status: Circuit between 1CN-31 and 1CN-32 is closed.
1CN-31 is at low level. Normal state
OFF
status: Circuit between 1CN-31 and 1CN-32 is open.
1CN-31 is at high level. Alarm state
Alarm codes ALO1, ALO2, and ALO3 are output to indicate each alarm type.
3
SERVOPACK
Alarm
detection
ALM output
Turns the main
circuit power
OFF