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1. FUNCTIONS AND CONFIGURATION
1.2 Function block diagram
The function block diagram of this servo is shown below.
(1) MR-J3-350B or less
MR-J3-200B4 or less
Base
amplifier
CN4
N( )
DC
Encoder
Current
detection
CN5
NFB MC
L
1
L2
L
3
L
11
L21
B2
U
V
W
B1
USB
USB
Power factor
improving DC
reactor
Regenerative
option
MR-J3BAT
P
1
P
2
D/A
Position
command
input
(Note 1)
(Note 2)
Power
supply
CHARGE
lamp
Regene-
rative
TR
Current
detector
Dynamic
brake
Electro-
magnetic
brake
Servo motorServo amplifier
Optional battery
(for absolute position
detection system)
Overcurrent
protection
Voltage
detection
Virtual
encoder
Virtual
motor
Model
torque
Personal
computer
Actual speed
control
Actual position
control
(Note 3)Cooling fan
Control
circuit
power
supply
Model position
control
Model
position
Model
speed
CN2
P( )
U
V
W
M
Model speed
control
Current
control
I/F Control
CN1BCN1A
Controller or
servo amplifier
Servo amplifier
or cap
Analog monitor
(2 channels)
CN3
Digital I/O
control
Diode
stack
Relay
RA
24VDC
Note 1. The built-in regenerative resistor is not provided for the MR-J3-10B (1).
2. For 1-phase 200 to 230VAC, connect the power supply to L
1, L2 and leave L3 open.
There is no L
3 for 1-phase 100 to 120VAC power supply. Refer to section 1.3 for the power supply specification.
3. Servo amplifiers MR-J3-70B or greater have a cooling fan.