Chapter 3 Wiring of Servo System                                                                                IS620P User Manual                                                 
- 40 -
Terminal 
Symbol
Terminal 
Name
Terminal Function
 
and 
Common DC 
bus terminal
For common DC bus connection when multiple servo drives are used 
in parallel. 
U, V, W
Servo motor 
connection 
terminals
Connect to U, V and W phases of the servo motor. 
PE
Grounding 
terminal
Two grounding terminals are respectively connected to the power 
supply grounding terminal and the servo motor grounding terminal. 
The entire system must be grounded. 
The following gures show the correct and wrong wiring of the external regen resistor.
CN1
CN2
U
V
W
-
P
+
D
C
R
S
T
Remove the jumper between      and 
D, and connect an external regen 
resistor between     and C.
CN1
CN2
U
V
W
-
P
+
D
C
R
S
T
Not connected to 
external regen 
resistor terminals
 
Observe the following precautions when wiring the external regen resistor:
1.  Do not directly connect the external regen resistor to the positive and negative poles of 
. 
Failure to comply will lead to damage of the servo drive or even cause a re. 
2.  Remove the jumper between 
 and D before using the external regen resistor. Failure to 
comply will cause overcurrent trip and thus damage the braking tube. 
3.  For selection of external regen resistors, refer to section 1.4. Do not select any resistor 
lower than the minimum resistance value. Otherwise, the servo drive will report Er201 or 
be damaged. 
4.  Make sure that H02-25, H02-26 and H02-27 are accurately set before using the servo 
drive. 
5.  Install the external regen resistor on incombustible matters (such as metal).