Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Mechatrolink-II Communication Reference - Manual (Page 60)

3 Wiring and Connection
3.1.3 Typical Main Circuit Wiring Examples
3-14
3.1.3 Typical Main Circuit Wiring Examples
Note the following points when designing the power ON sequence.
• Design the power ON sequence so that main power is turned OFF when a servo alarm signal (ALM) is output.
• The ALM signal is output for a maximum of five seconds when the control power is turned ON. Take this into consid-
eration when designing the power ON sequence. Design the sequence so the ALM signal is activated and the alarm
detection relay (1Ry) is turned OFF to stop the main circuit’s power supply to the SERVOPACK and converter.
• Select the power supply specifications for the parts in accordance with the input power supply.
The typical main circuit wiring examples are shown below.
• When turning ON the control power supply and the main circuit power supply, turn
them ON at the same time or turn the main circuit power supply after the control
power supply. When turning OFF the power supplies, first turn the power for the main
circuit OFF and then turn OFF the control power supply.
WARNING
• Do not touch the power supply terminals after turning OFF the power. High voltage may still remain in the
SERVOPACK and the converter, resulting in electric shock. When the voltage is discharged, the charge
indicator will turn OFF. Make sure the charge indicator is OFF before starting wiring or inspections.
Control power supply
ALM signal
5.0 s max.