Precautions For This Chapter; Input Power Supply Circuit - Mitsubishi Electric MELSERVO-J3 Series Instruction Manual

2. SIGNALS AND WIRING

2.1 Precautions for this chapter

The following items are not described in this chapter. Since these descriptions are the same as those of MR-
J3- B Servo Amplifier, refer to the MR-J3- B Servo Amplifier Instruction Manual.
Explanation of power supply system
Signal (device) explanations
Alarm occurrence timing chart
Interfaces
SSCNET cable connection
Connection of servo amplifier and servo motor
Servo motor with an electromagnetic brake
Grounding
Control axis selection

2.2 Input power supply circuit

CAUTION
Wire the power supply/main circuit as shown below so that power is shut off and the servo-on command turned
off as soon as an alarm occurs, a servo forced stop is made valid, or a controller forced stop is made valid. A
no-fuse breaker (NFB) must be used with the input cables of the main circuit power supply.
Item
Always connect a magnetic contactor between the main circuit power supply and
L , L , and L of the servo amplifier, and configure the wiring to be able to shut
1 2 3
down the power supply on the side of the servo amplifier's power supply. If a
magnetic contactor is not connected, continuous flow of a large current may cause
a fire when the servo amplifier malfunctions.
Use the trouble signal to switch main circuit power supply off. Otherwise, a
regenerative transistor fault or the like may overheat the regenerative resistor,
causing a fire.
During power-on, do not open or close the motor power line. Otherwise, a
malfunction or faulty may occur.
POINT
Even if alarm has occurred, do not switch off the control circuit power supply.
When the control circuit power supply has been switched off, optical module
does not operate, and optical transmission of SSCNET communication is
interrupted. Therefore, the servo amplifier on the rear axis displays "AA" at
the indicator and turns into base circuit shut-off. The servo amplifier stops
with starting dynamic brake.
For details of each signal, refer to section 3.3 of the MR-J3- B Servo
Amplifier Instruction Manual.
During power-on, do not open or close the motor power line. Otherwise, a
malfunction or faulty may occur.
MR-J3- B Servo Amplifier Instruction Manual
Section 3.3
Section 3.5
Section 3.6
Section 3.7 (excluding the internal connection diagram)
Section 3.9
Section 3.10
Section 3.11
Section 3.12
Section 3.13
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