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3.2 Driver terminal and connection instructions
Terminal symbol
Name
L1 L2 L3
Power terminal
R S T
U V W
Motor power line
terminal
P+ D C
Regenerative
braking resistor
Terminals
Ground terminal
CN1
Input and output
terminal
CN2
Encoder terminal
COM1
Communication
port
3.3 Braking resistor
Function : Discharge, to ensure the stability of the DC bus voltage. In servo motor control, the
back EMF generated by the motor is feed back to the bus capacitor, causing the bus voltage to rise.
When the voltage reaches the alarm limit (P0-14), the servo output alarm EN-03
Therefore, to ensure that the bus voltage does not exceed the voltage limit of device, the system
will conduct the discharge terminal when the voltage rises to the limit, and quickly balance the bus
voltage through the brake resistor.
Model selection：
Model
Output
current
CZ-A
13A
CZ-B
30A
CZ-C
40A
CZ-E
50A
CZ-E
75A
Notice: For 220V servo, discharge voltage is 370V;and 380V discharge voltage is 700V; The
discharge current can not exceed 80% of maximum output current when resistance value is
selected; more power can be selected when starting and stopping frequently
Wiring terminals：
Servo series
A/B/C series
E series
Fuction
Three/single phase 220V to 240V 50/60Hz. (If
single phase connect L1 & L2)
Connect with motor
Connected to the regenerative resistor, the external
resistor is connected between P+ and C
Connect to the power ground wire, ground
protection
Input and output signal DI/DO wiring
Encoder terminal connected to motor encoder
Communicate with the host computer to support
485, RS232 communication
Braking resistor model selection
Resistance
Power range
range
50~100Ω
》=100W
50~100Ω
》=200W
40~50Ω
》=500W
25~35Ω
》=1000W
20~35Ω
》=2000W
9
Recommended resistance value
50Ω
50Ω
40Ω
35Ω
35Ω
Terminal
P+ and C
P+ and PB
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