Instruction manual

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3. SIGNALS AND WIRING

3.7 Input power supply circuit

CAUTION

Always connect a magnetic contactor (MC) between the main circuit power supply

and L

1, L2, and L3 of the servo amplifier, and configure the wiring to be able to shut

down the power supply on the side of the servo amplifier’s power supply. If a

magnetic contactor (MC) is not connected, continuous flow of a large current may

cause a fire when the servo amplifier malfunctions.

Use the trouble signal to switch power off. Otherwise, a regenerative transistor

fault or the like may overheat the regenerative resistor, causing a fire.

3.7.1 Connection example

Wire the power supply and main circuit as shown below so that the servo-on (SON) turns off as soon as

alarm occurrence is detected and power is shut off.

A circuit breaker (NFB) must be used with the input cables of the power supply.

(1) For 3-phase 200 to 230VAC power supply

OFF

NFB MC

EMG

SON

VDD

COM

ALM RA

3-phase

200 to 230 VAC

Forced stop

Servo-on

Trouble

Servo amplifier

Forced

stop