Mitsubishi Electronics MR-J2S- A

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3. SIGNALS AND WIRING

3.7 Input power supply circuit

CAUTION

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

and L1, L2, and L3 of the servo amplifier, and configure the wiring to be able to shut

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

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

cause a fire when the servo amplifier m alfunctions.

Use the trouble (ALM) to switch power off. Otherwise, a regenerative transistor

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

POINT

For the power line circuit of the MR-J2S-11KA to MR-J2S-22KA, refer to

section 3.13 where the power line circuit is shown together with the servo

motor connection diagram.

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 no-fuse breaker (NFB) must be used with the input cables of the power supply.

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

RA OFF

Emergency ON

MC MC

NFB MC

L11

L21

VDD

COM

ALM RA

EMG

SON

Servo-on

Servo amplifier

stop

3-phase

Trouble

Emergency

stop

200 to 230 VAC