Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 166

Part 5: Review on Replacement of MR-J2S-30 kW or Higher Capacity Models with MR-J4-DU_
(2) MR-J4-DU_
This diagram shows MR-J4-DU30KB4 and MR-J4-DU37KB4. The way to interface MR-J4-DU_ is the same
as 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. L+ and L- conductors to connect the converter unit and drive unit are standard accessories. The converter unit and drive unit
are installed more closely together than they are shown in this diagram.
2. For the power supply specifications, refer to Part 7 "Common Reference Material".
3. For the power supply specifications of the cooling fan, refer to the Servo Motor Instruction Manual (Vol. 3).
4. Bus voltage decreases according to the voltage and operation pattern of the main circuit, and there may be a shift in dynamic
brake deceleration during forced stop deceleration. If dynamic brake deceleration is not desired, delay the time to turn off the
electromagnetic contactor.
5. Install an overcurrent protection device (molded-case circuit breaker, fuse, or others) to protect the branch circuit. (Refer to
section 5.3.)
6. The converter unit and the drive unit can be connected to the control circuit power supply (L11/L21) by daisy chain. Refer to
section 5.2 for the wire size and the selection of the overcurrent protection device.
R S T
(Note 5)
L1
L2
L3
L11
L21
(Note 6)
(Note 6)
L11
L21
Power factor
improving DC
reactor
R C
S P
MR Configurator2
Converter unit
L+
L-
C
P2
P1
Protection
coordination
cable
P2
P1
5 - 5
Personal
computer
+
USB cable
(Note 1)
L+
L-
L21
BU BV BW E U V W
Servo motor
Drive unit
L11
Encoder cable