Yaskawa Σ-V Series AC Servo Drives Rotational Motor MECHATROLINK-III - Manual (Page 41)

3 Wiring and Connection
3.1.3 Typical Main Circuit Wiring Examples
3-4
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.
• 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.
• Provide separate AC/DC power supplies for the main circuits and for controls.
• Power supplies must have double or reinforced insulation that conforms to safety
standards.
• Do not connect devices (such as motors or solenoids) that greatly change the load or
devices (such as electromagnetic switches) that generate surge voltages to the con-
troller power line.
Failure to observe this caution may result in deterioration of the internal elements or a
blown fuse.
WARNING
• 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.
Control power supply
ALM signal
5.0 s max.
L1
ENC
SERVOPACK
SGDV
U
V
W
M
0 V
1Ry
4
5
1D
1KM
L2
CN1
1QF
R T
+24 V
1Ry
1PL
1KM
1SA 1KM
1Ry
C1
C2
ALM
COM_SG
1FLT
CN4
CN3
Non-isolated AC/DC
converter for main
circuit power supply
Non-isolated AC/DC
converter for control
power supply
(For servo
alarm display)
supply ON
Main power
supply OFF
Main power
1QF
1FLT
1KM : Molded-case circuit breaker
: Noise filter
: Magnetic contactor (for main circuit power supply)
1Ry
1PL
1SA
1D : Relay
: Indicator lamp
: Surge absorber
: Flywheel diode
MECHA