Yaskawa Large Capacity Sigma II Series - Manual (Page 7)

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„ Wiring
• Connect the ground terminal to electrical codes (ground resistance: 100 Ω or less).
Improper grounding may result in electric shock or fire.
• Use the thermal protector built into the servomotor according to either of the two following meth-
ods.
SGMBH servomotors are cooled by a fan. If the fan is defective or power to the fan is disconnected, heat
from the motor may result in burns or fire.
Method 1:
• Wire the output from the thermal protector to the host controller and turn OFF the servo when the
thermal protector operates.
Method 2:
• Wire the thermal protector to the operating circuit of the main circuit contactors or the host control-
ler and turn OFF the main circuit when the thermal protector operates.
WARNING
Host Controller
Servo OFF
PG
M
Thermal
protector
Main circuit
contactors
Main circuit
power supply SGDH
SERVOPACK
PG
M
SGDH
Thermal
protector
Main circuit
contactors
To main circuit
contactors
Host controller or operating
circuit of main circuit contactors
Main circuit
power supply
SERVOPACK
• Do not connect a three-phase power supply to the SERVOPACK’s U, V, or W output terminals.
Doing so may result in injury or fire.
• Securely fasten the power supply terminal screws and motor output terminal screws.
Not doing so may result in fire.
CAUTION