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1. FUNCTIONS AND CONFIGURATION
1 - 9
(b) MR-J4-500B4(-RJ)/MR-J4-700B4(-RJ)
Dynamic
brake
circuit
Current
detector
Virtual
motor
Virtual
encoder
L11
L21
Cooling fan
Encoder
N-C
Current
detection
Overcurrent
protection
Voltage
detection
(Note 1)
Power
supply
MCMCCB
Base
amplifier
STO
circuit
CN5
USB
USB
CN1A CN1B
D/A
Position
command
input
CN3
Servo amplifier
Diode
stack
U
V
W
U
V
W
P3 P4 (Note 2)
Relay
P+
+
+
B
RA
24 V DC
B1
B2
Battery
(For absolute
position detection
system)
CN4
STO
switch
M
CN2
CN8
Control
circuit
power
supply
Model
position
control
Model
speed
control
Servo motor
Regenerative
option
L3
L2
L1
U U
U
Step-
down
circuit
(Note 3)
(Note 4)
Power factor
improving
DC reactor
Charge
lamp
Regene-
rative
TR
Electromagnetic
brake
Model position Model speed Model torque
Current
control
Actual
position
control
Actual
speed
control
IF Control
Personal
computer
Servo system
controller or
servo amplifier
Servo
amplifier
or cap
Analog monitor
(2 channels)
Digital I/O
control
CN2L
External encoder
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. 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.