Mitsubishi Electric MELSERVO-J4 Instruction Manual page 18

1. FUNCTIONS AND CONFIGURATION
(3) MR-J4-11KA4(-RJ)/MR-J4-15KA4(-RJ)/MR-J4-22KA4(-RJ)
Servo amplifier P3
MCCB MC
L1
(Note 1)
U
L2
Power
supply
U
L3
L11
L21
STO
switch
Analog
(2 channels)
Note 1. Refer to section 1.2.1 for the power supply specification.
2. MR-J4 servo amplifier has P3 and P4 in the upstream of the inrush current suppression circuit. They are different from P1 and
P2 of MR-J3 servo amplifiers.
3. This is for MR-J4-_A4-RJ servo amplifier. MR-J4-_A4 servo amplifier does not have CN2L connector.
4. 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 section 6.1.1.
5. The power factor improving AC reactor can also be used. In this case, the power factor improving DC reactor cannot be used.
When not using the power factor improving DC reactor, short P3 and P4.
(Note 5)
Power factor
regenerative resistor
improving
regenerative option
DC reactor
P4 (Note 2)
Diode
Thyristor
stack
+
U
Cooling fan
Control
+
circuit
power
STO
supply
circuit
amplifier
Position
command
Model
input
position
control
Model position
Actual
position
control
A/D
I/F
CN1
DI/O control
•Servo-on
•Input command pulse.
computer
•Start
•Malfunction, etc
External
or
P+ C N-
Regene-
rative
TR
Charge
lamp
Base Voltage
Overcurrent
detection
protection
Virtual
encoder
Model
speed
control
Virtual
motor
Model speed Model torque
Actual
Current
speed
control
control
USB RS-422
CN5 CN3
Personal
Controller
USB RS-422
1 - 5
(Note 4)
External
dynamic brake
(optional)
U
V
Current
detector
W
RA
24 V DC
Current
detection
Step-
down
circuit
MR-BAT6V1SET
Optional battery
(For absolute
position detection
system)
(Note 3)
D/A
CN6
Analog monitor
(2 channels)
Servo motor
U
V
M
W
B1
Electromagnetic
B
brake
B2
Encoder
External encoder