3. SIGNALS AND WIRING

3.7 Input power supply circuit

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.

CAUTION 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.

3.7.1 Connection example

Wire the power supply and main circuit as shown below so that the servo-on signal 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.

For 1-phase 100VAC or 1-phase 230VAC power supply

1-phase

NFB

MC

Servo amplifier

 

 

L

100 to 120

VAC

or 1-phase 230VAC

1

 

L2

 

L3

(Note)

L11

L21

3-phase

200 to 230VAC

Note. Not provided for 1-phase 100 to 120VAC.

 

Emergency

 

RA

stop OFF

ON

 

 

MC

 

 

MC

 

 

SK

NFBMC

L1 Servo amplifier

L2 L3

L11

L21

Emergency stop

Servo-on

EMG

SON

SG

VDD

COM

ALM

RA

Trouble

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Mitsubishi Electronics MR-J2S- A instruction manual Vac, Nfbmc, Emg Son Vdd Com Alm