Instruction manual

1 - 2
1. FUNCTIONS AND CONFIGURATION
1.2 Function block diagram
The function block diagram of this servo is shown below.
(1) MR-J3-350A or less
Regenerative
brake
Base amplifier
Voltage
detection
Overcurrent
protection
Encoder
Dynamic
brake
Current
detector
CHARGE
lamp
RADS
Control
circuit
power
supply
(MR-J3-70A or more)
Fan
Electro-
magnetic
brake
Servo motor
D
C
P
Regenerative
brake option
NFB
Power
supply
3-phase
200 to
230VAC,
1-phase
230VAC
or 1-phase
100 to 120V
MC
L
1
L
2
L
3
L
11
L
21
A/D
CN1
D I/O control
Servo on
Start
Failure, etc.
Analog
(2 channels)
E2
I/F
Servo amplifier
Model position
control
Model speed
control
Pulse
input
Model
position
Actual position
control
Actual speed
control
Current
control
Model torque
Virtual
motor
Virtual
encoder
CN2
MR-J3BAT
Optional battery
(for absolute position
detection system)
U
V
W
U
V
W
M
E1
Current
detection
Model
speed
(Note2)
(Note1)
Note 1. The built-in regenerative brake resistor is not provided for the MR-J3-10A (1).
CON1
Regene-
rative
TR
P
1
P
2
Power factor
improving DC
reactor
CN5
USB
USB
Personal
computer
CN3
RS-422
RS-422
Controller
CN6
D/A
Analog monitor
(2 channels)
2. For 1-phase 230VAC, connect the power supply to L
1
,L
2
and leave L
3
open.
There is no L
3
for 1-phase 100 to 120VAC power supply.
N