Mitsubishi Electric MR-J4, Instruction Manual

Page: 87 / 794

3. SIGNALS AND WIRING
3 - 8
3.1.2 400 V class
(1) MR-J4-60A4(-RJ) to MR-J4-350A4(-RJ)
(Note 6)
MC
ALM
DOCOM
CN1
(Note 4)
24 V DC (Note 12)
24 V DC (Note 12)
Malfunction
RA1
L1
L2
L3
3-phase
380 V AC to
480 V AC
Servo amplifier
P3
P4
P+
L11
L21
N-
D
C
U
V
W
(Note 1) (Note 9)
(Note 2)
CNP1
CNP3
CNP2
Servo motor
U
V
W
M
Motor
Encoder
CN2
(Note 3)
Encoder cable
(Note 5)
Malfunction
RA1
OFF
MC
ON
MC
SK
Emergency stop switch
CN1
Forced stop 2
Servo-on
(Note 4)
EM2
SON
DICOM
CN8
(Note 8)
Short-circuit connector
(Packed with the servo amplifier)
(Note 7)
Main circuit power supply
MCCB
(Note 10)
(Note 10)
(Note 11)
Step-down
transformer
Note 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. Refer to section 11.11 for details. Additionally, a power factor improving DC reactor and
power factor improving AC reactor cannot be used simultaneously.
2. Always connect between P+ and D terminals. (factory-wired) When using the regenerative option, refer to section
11.2.
3. For the encoder cable, use of the option cable is recommended. For selecting cables, refer to "Servo Motor
Instruction Manual (Vol. 3)".
4. This diagram is for sink I/O interface. For source I/O interface, refer to section 3.9.3.
5. For connecting servo motor power wires, refer to "Servo Motor Instruction Manual (Vol. 3)".
6. 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.
7. Configure a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the
servo amplifier.
8. When not using the STO function, attach the short-circuit connector came with a servo amplifier.
9. When wires used for L11 and L21 are thinner than wires used for L1, L2, and L3, use a molded-case circuit
breaker. (Refer to section 11.10.)
10. Connecting a servo motor for different axis to U, V, W, or CN2 of the servo amplifier may cause a malfunction.
11. Stepdown transformer is required when the coil voltage of the magnetic contactor is 200 V class.
12. 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.