Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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3 SIGNALS AND WIRING
3.1 Connection example of power circuit
400 V class
MR-J4-60GF4(-RJ) to MR-J4-350GF4(-RJ)
*1 Between P3 and P4 is connected by default. When using the power factor improving DC reactor, remove the short bar between P3 and
P4. Additionally, a power factor improving DC reactor and power factor improving AC reactor cannot be used simultaneously.

Page 407 Power factor improving DC reactors
*2 Always connect between P+ and D terminals. (factory-wired) When using the regenerative option, refer to the following.

Page 335 Regenerative options
*3 For the encoder cable, use of the option cable is recommended. For selecting cables, refer to "Servo Motor Instruction Manual (Vol. 3)".
*4 If disabling ALM (Malfunction) output with the parameter, configure up the power supply circuit which switches off the magnetic contactor
after detection of alarm occurrence on the controller side.
*5 This diagram shows sink I/O interface. For source I/O interface, refer to the following.
 Page 118 Source I/O interface
*6 For connecting servo motor power wires, refer to "Servo Motor Instruction Manual (Vol. 3)".
*7 Use a magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of contacts) of 80
ms or less. Depending on the main circuit voltage and operation pattern, bus voltage decreases, and that may cause the forced stop
deceleration to shift to the dynamic brake deceleration. When dynamic brake deceleration is not required, slow the time to turn off the
magnetic contactor.
*8 Configure a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the servo amplifier.
*9 When not using the STO function, attach the short-circuit connector came with a servo amplifier.
*10 When wires used for L11 and L21 are thinner than wires used for L1, L2, and L3, use a molded-case circuit breaker.

Page 404 Molded-case circuit breakers, fuses, magnetic contactors
*11 Connecting a servo motor for different axis to U, V, W, or CN2 of the servo amplifier may cause a malfunction.
*12 Stepdown transformer is required when the coil voltage of the magnetic contactor is 200 V class.
*13 The illustration of the 24 V DC power supply is divided between input signal and output signal for convenience. However, they can be
configured by one.
MC *7
ALM
DOCOM
CN3
*5
Malfunction
*4
RA1
L1
L2
L3
P3
P4
P+
L11
L21
N-
D
C
U
V
W
*1 *10
*2
CNP1
CNP3 *11
CNP2
U
V
W
M
Motor
CN2 *11
*6
Malfunction *4
RA1
OFF
MC
ON
MC
SK
CN3
Forced stop 2
*5 EM2
DICOM
CN8
Short-circuit connector
*9
(Packed with the servo amplifier)
Main circuit power supply *8
MCCB
24 V DC *13
24 V DC
*13
3-phase
380 V AC to
480 V AC
Step-down
transformer
*12
Emergency stop switch
Servo amplifier Servo motor
Encoder
Encoder
cable *3