1-7
1-4 System Block Diagrams
1
Features and System Confi
g
uration
R88D-GN20H-ML2
GR
Gate drive
SW power
supply
Main circuit
control
Internal
control
power
supply
L2C
L1C
L2
L3
L1
FUSE
+
−
~
+
−
~
~
~
15V
G1
VCC1
±VCC
G2
E5V
Voltage
detection
Current
detection
Regene-
rative
control
Relay
drive
TH
GR
Terminals
Terminals
U
V
W
Cooling fan
B1
B3
B2
Internal regeneration resistor
Control I/O interface
MECHATROLINK-II
interface
RS-232
interface
CN6B
connector
CN6A
connector
CN3
connector
CN2 encoder
s
ign
a
l connector
CN1 control I/O connector
RS
485
±S
+
E5V
+
BAT
EG
G
MPU & ASIC
Position, speed, and torque processor,
PWM control
Encoder
communications
interface
Display/
setting circuits
~
MECHATROLINK-II
communications line
RS-232
computer