Mitsubishi Electric MELSERVO-J3 Series Handbook page 201

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
(2) MR-J4-DU_
The diagram shows MR-J4-DU30KB4 and MR-J4-DU37KB4. The interface connection of MR-J4-DU_ is the
same as that of MR-J4-_. Refer to each servo amplifier instruction manual.
(Note 2)
Power supply
Molded-case
circuit breaker
(MCCB)
(Note 4)
Magnetic
contactor
(MC)
Line noise
filter
(FR-BLF)
(Note 3)
Servo motor
cooling fan
power supply
Magnetic
R S T
contactor
operation
coil
(I/O signal)
Molded-case
circuit breaker
(MCCB)
Regenerative option
Note 1. The bus bars on L+ and L- for connecting the resistance regeneration converter unit to the drive unit are standard accessories.
In the actual connection, the resistance regeneration converter unit is closely mounted to the drive unit.
2. For the power supply specifications, refer to "Part 6: Common Reference Material".
3. For specifications of the cooling fan power supply, refer to "Servo Motor Instruction Manual (Vol. 3)".
4. An bus voltage may drop, depending on the main circuit voltage and operation pattern, causing a dynamic brake deceleration
during a forced stop deceleration. When dynamic brake deceleration is not required, delay the time to turn off the magnetic
contactor.
5. If the wire used for L11 and L21 is thinner than the wire used for L1, L2, and L3, use a molded-case circuit breaker. (Refer to
Section 7.3 in this part.)
R S T
Resistance regeneration converter unit
(Note 5)
L1
L2
L3
L11
L21
L11
L21
Power factor
improving DC
reactor
R C
S P
MR Configurator2
L+
L-
C
P2
P1
Protection
coordination
cable
P2
P1
5 - 6
Personal
computer
+
USB cable
Drive unit
(Note 1)
L+
L-
L21
Encoder cable
BU BV BW E U V W
Servo motor
L11