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5 SIGNALS AND WIRING
5.1 Example power circuit connections
5.1
Example power circuit connections
Precautions
• Connect a magnetic contactor between a power supply and the main circuit power supply (L1/L2/L3) of a converter unit to
configure a circuit that shuts off the power supply on the converter unit side because failure of the converter unit may cause
smoke and fire if a magnetic contactor is not connected.
• Use a configuration that shuts off the main circuit power supply with ALM (Malfunction).
• Check the converter unit model and use the correct power supply voltage.
• Exogenous noise or lightning surges may degrade the characteristics of the surge absorber (varistor) built into the
converter unit and damage it.
• To prevent malfunction, avoid bundling the converter unit's power line (input cable) and signal cables together or running
them parallel to each other. Separate the power lines from the signal cables.
• Provide adequate protection to prevent an unexpected restart after an instantaneous power failure.
• Configure wiring so that the main circuit power supply is shut off and the servo-on command is turned off after deceleration
to a stop due to an alarm occurrence, an enabled servo forced stop, or a quick stop command from the controller. Use a
molded-case circuit breaker (MCCB) with the input cables of the main circuit power supply.
