IS810N-INT Series Servo System User Manual (Brief)Chapter 2 Product Information
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2.5 Servo System Wiring
Figure 2-13 Wiring of a three-phase 380 V system
The servo drive is directly connected to an industrial power supply, with no isolation such 
as transformers. In this case, a fuse or circuit breaker must be connected to the input 
power supply to prevent cross electric accidents in the servo system. The servo drive is 
not congured  with a built-in  protective grounding  circuit. Connect  a  residual current  device 
(RCD) against both overload and short-circuit, or a specialized RCD combined with protective 
grounding.
Do not use magnetic contactors for running or stopping the servo motor. As a high-inductance 
device, the motor generates instantaneous high voltage, which may damage the contactor.
Pay attention  to the  power  capacity when  connecting an  external control  power  supply or  a 
24 VDC power supply, especially when the power supply is for powering up multiple drives 
or brakes.  Insufcient power  supply will  lead to  current insufciency, thus causing a drive or 
brake failure. The brake shall be powered up by a 24 VDC power supply. The power must 
match the motor model and meets the brake requirements.
Note 1: Remove the jumper between terminals   and C of the servo drive when connecting 
a regenerative resistor.
Note 2: CN3 is a communication output port. CN4 is a communication input port.
Circuit breaker for wiring
Used to protect the power 
cable and cut off the circuit 
during overcurrent.
Noise filter
A noise filter is installed to 
prevent any external noise 
from the power cable.
Electromagnetic 
contactor
Turn ON/OFF power of 
the servo drive. Install a 
surge 
Suppressor when using 
this contactor.
Power Supply
Three-phase 380 VAC
Servo drive PLC 
communication cable 
3940
2 1
CN
5
CN
3
 Ether NET  Ethe rCAT
CN1 RS48
5
C
N
2
  C
A
N
CANERR
CANRUN
BF
SF
ERR
RUN
RUN/ STOP
MFK
0 1 2 3 7654
2 765410 3
4 5 6 73210
I
II
CN4
Servo drive I/O 
terminal
 
Servo motor main circuit 
cable and encoder cables
Servo drive Ethernet 
communication cable 
Servo motor
Servo motor
Servo motor main 
circuit cable and 
encoder cables
Servo motor
Electromagnetic 
contactor
24 VDC 
power supply
24 VDC
R    S     T