Mitsubishi Electric MELSERVO-J4 series Instruction Manual page 26

1. FUNCTIONS AND CONFIGURATION
(c) MR-J4-11KB4(-RJ)/MR-J4-15KB4(-RJ)/MR-J4-22KB4(-RJ)
Servo amplifier
MCCB MC
L1
(Note 1)
U
L2
Power
supply
U
L3
L11
L21
STO
switch
Servo system
controller or
servo amplifier
Note 1. Refer to section 1.3 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-_B4-RJ servo amplifier. MR-J4-_B4 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 chapter 8.
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
DC reactor regenerative option
P3 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
IF Control
CN1A CN1B
Servo
amplifier
or cap
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
CN5
Personal
Analog monitor
computer
(2 channels)
USB
1 - 9
(Note 4)
External
dynamic brake
(optional)
U U
V V
Current
detector
W W
RA
24 V DC
Current
detection
Step-
down
circuit
Battery
(For absolute
position detection
system)
External encoder
(Note 3)
D/A
CN3
Digital I/O
control
Servo motor
M
B1
Electromagnetic
B
brake
B2
Encoder