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7 input power supply circuit, 1 connection example, Signals and wiring – MITSUBISHI ELECTRIC MELSERVO MR-J2S- A User Manual

Page 93: Caution

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3. SIGNALS AND WIRING

3.7 Input power supply circuit

CAUTION

When the servo amplifier has become faulty, switch power off on the servo

amplifier power side. Continuous flow of a large current may cause a fire.

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

transistor fault or the like may overheat the regenerative brake 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 supply

RA

OFF

Emergency

ON

MC

MC

SK

NFB

MC

L

1

L

2

L

3

L

11

L

21

VDD

COM

ALM

RA

EMG

SON

SG

Servo-on

Servo amplifier

stop

3-Phase

Trouble

Emergency

stop

200 to 230 VAC