Mitsubishi Electric MELSERVO-J4 series Instruction Manual page 86

3. SIGNALS AND WIRING
(3) MR-J4-11KB4(-RJ) to MR-J4-22KB4(-RJ)
(Note 12)
Step-down
transformer
MCCB
3-phase
380 V AC to
480 V AC
(Note 10)
(Note 8)
Main circuit power supply
(Note 5) Forced stop 2
(Note 9)
Short-circuit connector
(Packed with the servo amplifier)
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. When using the regenerative resistor, 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. 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 is for sink I/O interface. For source I/O interface, refer to section 3.8.3 in MR-J4-_B(-RJ) Servo Amplifier
Instruction Manual.
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. (Refer to
section 11.10.)
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 for coil voltage of magnetic contactor more than 200 V class servo amplifiers.
13. For the servo motor with a cooling fan.
14. For the cooling fan power supply, refer to "Servo Motor Instruction Manual (Vol. 3)".
15. 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.
16. Use an external dynamic brake for this servo amplifier. Failure to do so will cause an accident because the servo motor does
not stop immediately but coasts at an alarm occurrence for which the servo motor does not decelerate to stop. Ensure the
safety in the entire equipment. For alarms for which the servo motor does not decelerate to stop, refer to chapter 8.
(Note 4)
Malfunction
OFF
RA1
Emergency stop switch
Servo amplifier
(Note 7)
MC
L1
L2
L3
P+
C
Regenerative
resistor
(Note 2)
L11
L21
N-
P3
(Note 1)
P4
CN3
EM2
DICOM
24 V DC (Note 15)
CN8
ON
MC
MC
SK
External
dynamic brake
(optional)
(Note 16)
(Note 11)
U
V
W
(Note 6)
(Note 11)
(Note 3)
CN2
Encoder cable
CN3
24 V DC (Note 15)
DOCOM
ALM
RA1
3 - 11
(Note 14)
Cooling fan
power supply
Servo motor
U
Motor
V
M
W
Encoder
BU
BV
BW
Cooling fan
(Note 13)
(Note 5)
(Note 4)
Malfunction
MCCB