Typical Main Circuit Wiring Example - YASKAWA E-V-MD Series User Manual

5.1.3 Typical Main Circuit Wiring Example

Take the following points into consideration when designing the power ON sequence.
• You must design the system to turn OFF the main circuit power supply when a servo alarm is detected.
• Select the power supply specifications for the parts according to the input power supply.
The typical main circuit wiring examples are shown below.
• Voltage remains in the SERVOPACK even after the power supply is turned OFF. To prevent electric shock,
do not touch the input terminals for the main circuit power supply or those for the control power supply.
Before wiring or inspections, confirm that the SERVOPACK has completely discharged.
• When you turn ON the control power supply and the main circuit power supply, turn
them ON at the same time or turn ON the main circuit power supply after the control
power supply.
When you turn OFF the power, first turn OFF the power for the main circuit and then
turn OFF the control power.
• Provide separate AC/DC power supplies for the main circuits and for controls.
• Use a power supply with double insulation or reinforced insulation that is certified for
safety standards.
• Do not connect devices to the control power line that have large load fluctuations,
such as motors or solenoids, or devices that have surge voltages, such as switches.
Otherwise, internal elements may deteriorate and fuses may blow.
• Design a sequence to turn OFF the power supplies to the SERVOPACK if you detect
a SERVOPACK error at the host controller.
• Always use molded-case circuit breakers or fuses to protect the servo system.
• The SERVOPACK does not have a built-in protective circuit for grounding. To build a
safe system, use an earth-leakage breaker for ground protection together with a
molded-case circuit breaker.
• Always turn ON and OFF the power supplies to the SERVOPACK on the input (AC)
sides of the main circuit power supply and the control power supply.
• Do not frequently turn ON and OFF the main circuit power supply or the control power
supply.
Frequently turning power ON and OFF will causes elements in the SERVOPACK to
deteriorate.
WARNING
5.1 Wiring the Main Circuit and Control Power Supplies
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