2-45   
2-4 Basic block diagram of servo system 
§ JSDG2S-10A ~ JSDG2S-15A (Built-in regenerative resistor) 
R
S
T
Surge 
absorber
Rectifier 
circuit
CHANGE
+
P+ PC P1
N-
U
V
W
Encoder
Servo motor
CPU
(Control unit)
Panel operator
r
s
Surge 
absorber
+
Control 
power
M
Temperature 
dete cti on
Relay 
drive
Gate 
drive
Current 
detection
Voltage 
detection
CN2
Gate drive
Optical 
scale
CN8
CN1
CN3
PC
PLC
CN5/CN6
EtherCAT
CANopen
Varies according to the 
mo del number
CN4
RS-485
Regenerative 
processing circuit
Dynamic 
brakes
GATE
DRIVE
Rectifier 
circuit
 
 
Note 1: CANopen is a function for the JSDG2S model only. 
Note 2: EtherCAT is a function for the JSDG2S-E and JSDG2S-EL models only.   
Note 3: Prepare the regenerative resistor by yourself; during installation, the wiring between the PC 
contact and the P1 contact of the TB1 terminal must be removed. Then connect the 
regenerative resistor between the P contact and PC contact, refer to “5-6-7 Choosing an 
external regenerative resistor” for details.