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04 Wiring

Version 8.1 by Iris on 2025/10/15 20:52

Main Circuit Wiring

Main Circuit Terminals

(1) Main circuit terminal distribution of VD3E type A servo drive

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Figure 4-1 VD3E Type A Servo Drive Main Circuit Terminal Schematic

Table 4-1 Name and function of main circuit terminal of VD3E type A servo drive
Terminal numberTerminal nameTerminal function
L1Power input terminalSingle-phase 220V AC input is connected to L1 and L3.
L2
L3
P+Braking resistor terminal

Use internal braking resistor: short connected C-D.

Use an external braking resistor: please disconnect the short wire between C-D, and then connect the external braking resistor between P+ and C;

C
D
UMotor power line terminalConnect with the U, V, W of the motor to supply power to the motor.
V
W
Ground terminalGround terminalGrounding of the servo drive.

(2) Main circuit terminal distribution of VD3E type B servo drive (220V)

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Figure 4-2 Schematic Diagram of VD3E Type B Servo Drive Main Circuit Terminal

Table 4-2 Name and function of main circuit terminal of VD3E type B servo drive
Terminal numberTerminal nameTerminal function
L1Power input terminal

Single-phase 220V AC input is connected to L1 and L3.

Three-phase 220V AC input is connected to L1, L2, L3;

L2
L3
L1CControl power input terminalSingle-phase 220V AC input connected to L1C and L2C
L1C
P+Braking resistor terminal

Use internal braking resistor: short connected C-D.

Use an external braking resistor: please disconnect the short wire between C-D, and then connect the external braking resistor between P+ and C;

C
D
UMotor power line terminalConnect with the U, V, W of the motor to supply power to the motor.
V
W
Ground terminalGround terminalGrounding of the servo drive.

(3) Main circuit terminal distribution of VD3E type B servo drive (380V)

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Figure 4-3 Schematic diagram of main circuit terminals of VD3E Type B servo drive (380V)

Table 4-3 Name and function of main circuit terminal of VD3E type B servo drive
Terminal numberTerminal nameTerminal function
L1Power input terminal

Three-phase 220V AC input is connected to L1, L2, L3;

L2
L3
L1CControl power input terminalSingle-phase 220V AC input connected to L1C and L2C
L1C
P+Braking resistor terminal

Use internal braking resistor: short connected C-D.

Use an external braking resistor: please disconnect the short wire between C-D, and then connect the external braking resistor between P+ and C;

C
D
UMotor power line terminalConnect with the U, V, W of the motor to supply power to the motor.
V
W
Ground terminalGround terminalGrounding of the servo drive.

(4) Main circuit terminal distribution of VD3E type C servo drive (380V)

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Figure 4-4 Schematic diagram of main circuit terminals of VD3E Type C servo drive (380V)

Table 4-4 Name and function of main circuit terminal of VD3E type C servo drive
Terminal numberTerminal nameTerminal function
L1Power input terminal

Three-phase 220V AC input is connected to L1, L2, L3;

L2
L3
L1CControl power input terminalSingle-phase 220V AC input connected to L1C and L2C
L1C
P+Braking resistor terminal

Use internal braking resistor: short connected C-D.

Use an external braking resistor: please disconnect the short wire between C-D, and then connect the external braking resistor between P+ and C;

C
D
UMotor power line terminalConnect with the U, V, W of the motor to supply power to the motor.
V
W
Ground terminalGround terminalGrounding of the servo drive.

Power Wiring Example

(1) VD3E Type A Drive Single-phase 220V Main Circuit Wiring 

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Figure 4-5 VD3E Type A Drive Single-phase 220V Main Circuit Wiring

(2) VD3E Type B Drive Single-phase 220V Main Circuit Wiring

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Figure 4-6 VD3E Type B Drive Single-phase 220V Main Circuit Wiring

(3) VD3E Type B Drive Three-phase 220V Main Circuit Wiring

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Figure 4-7 VD3E Type B Drive Three-phase 220V Main Circuit Wiring

(4) VD3E Type B Drive Three-phase 380V Main Circuit Wiring

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Figure 4-8 VD3E Type B Drive Three-phase 380V Main Circuit Wiring

(5) VD3E Type C Drive Three-phase 380V Main Circuit Wiring

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Figure 4-9  VD3E Type C Drive Three-phase 380V Main Circuit Wiring

Precautions for Main Circuit Wiring

① The input power line cannot be connected to the output terminals U, V and W, otherwise the servo drive will be damaged. When using the built-in braking resistor, C and D must be connected (factory default connection).

② When the cables are bundled and used in pipes, etc., due to the deterioration of heat dissipation conditions, please consider the allowable current reduction rate.

③ When the temperature in the cabinet is higher than the cable temperature limit, please choose a cable with a larger cable temperature limit, and it is recommended that the cable wire use Teflon wire. Please pay attention to the warmth of the cable in the low temperature environment. Generally, the surface of the cable is prone to hardening and breakage under the low temperature environment.

④ The bending radius of the cable should be more than 10 times the outer diameter of the cable itself to prevent the core of the cable from breaking due to long-term bending.

Power Line Connection of Servo Drive and Servo Motor

Power Cable

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Figure 4-10 Connection schematic diagram of servo drive and servo motor

Wecon VD3E series servo drives have 3 kinds of interface power cables: rectangular plug, aviation plug and in-line type.

Table 4-5 Power cable servo motor side connector
Connector exteriorTerminal pin distributionPin description

Adaptation

Motor flange

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Rectangular plug

Pin numberSignal nameColor
1URed
2VWhite
3WBlack
4PEYellow-green

 

60

80

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Aviation plug

Pin numberSignal nameColor
2UBlack
4VYellow-green
3WBlack
1PEBlack

 

110

130

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In-line type plug

Pin numberSignal nameColor
3URed
1VWhite
2WBlack
4PEYellow-green

 

60

80

✎Note: The color of the lines is subject to the actual product. The lines described in this manual are all lines of Wecon.

Brake Device Cable

Connector shape and terminal pin distributionPin description

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Pin numberSignal name
1DC 24V
2GND
3-

 

Connector shape and terminal pin distributionPin descriptionAdaptable motor flange
WD Series

VD3E manual wd barke cable.png

 

Pin numberSignal name
1BR+
2BR-

 

60

80

WE Series

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Pin numberSignal name
1DC 24V
2GND
3-

 

80

110

130

Encoder Cable Connection of Servo Drive and Servo Motor

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Figure 4-11 Encoder cable connection schema

Table 4-6 Encoder cable servo drive side connector
Connector exteriorTerminal pin distributionPin description

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Pin numberSignal name
15V
2GND
3-
4-
5SD+
6SD-

 

Table 4-7 Absolute encoder cable connector (rectangular plug)
Connector shape and terminal pin distribution

Adapted motor

Flange

image-20230626105045-1.pngimage-20230626105045-2.png

60

80

image-20230626105045-3.pngimage-20230626105045-4.png
Pin numberSignal name
75V
8GND
4SD+
5SD-
3Shield
1Battery+
2Battery-

 

Table 4-8 Encoder cable pin connection relationship
Drive side J1394DescriptionMotor side
Pin numberSignal nameRectangular plug pin numberCable color
15VEncoder +5v power7Blue
2GNDEncoder power ground8Orange
5SD+Serial communication signal +4Green
6SD-Serial communication signal -5Brown
ShellShieldShield3-
--Battery+1*Pink
--Battery-2*Pink-Black

The pin with “*” indicates the signal line of encoder battery. If the multi-turn battery memory function is not used, you don’t need to connect the signal lines. It is only used as single turn encoder line at this time.

✎Note: The color of the cable is subject to the actual product. The cables described in this manual are all cables of Wecon!

Table 4-9 Absolute value encoder cable connector (aviation plug)
Connector shape and terminal pin distribution

Adapted motor

Flange

image-20230626105045-5.pngimage-20230626105045-6.png

110

130

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Pin numberSignal name
75V
5GND
6SD+
4SD-
1Shield
3Battery+
2Battery-
Table 4-10 Encoder cable pin connection relationship
Drive side J1394DescriptionMotor side
Pin numberSignal nameAviation plug pin numberCable color
15VEncoder +5v power7Blue
2GNDEncoder power ground5Orange
5SD+Serial communication signal +6Green
6SD-Serial communication signal -4Brown
ShellShieldShield1-
--Battery+3*Pink
--Battery-2*Pink-Black

The pin with “*” indicates the signal line of encoder battery. If the multi-turn battery memory function is not used, you don’t need to connect the signal lines. It is only used as single turn encoder line at this time.

✎Note: The color of the cable is subject to the actual product. The cables described in this manual are all cables of Wecon!

Table 4-11 Absolute value encoder cable connector L type (in-line type)
Connector shape and terminal pin distribution

Adapted motor

Flange

image-20230626105045-7.png

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60

80

 

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Pin numberSignal name
75V
5GND
6SD+
4SD-
1Shield
3Battery+
2Battery-
Table 4-12 Encoder cable pin connection relationship
Drive side J1394DescriptionMotor side
Pin numberSignal nameAviation plug pin numberCable color
15VEncoder +5v power7Blue
2GNDEncoder power ground5Orange
5SD+Serial communication signal +6Green
6SD-Serial communication signal -4Brown
ShellShieldShield1-
----Battery+3*Brown
----Battery-2*Black

✎Note: The color of the cable is subject to the actual product. The cables described in this manual are all cables of Wecon!

Table 4-13  Absolute value encoder cable connector L2 type (in-line type)
Connector shape and terminal pin distributionAdapted motor flange
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60

80

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Pin numberSignal name
15V
2GND
3SD+
4SD-
5Shield
6Battery+
7Battery-
Table 4-14 Encoder cable pin connection relationship
Drive side J1394DescriptionMotor side
Pin numberSignal nameAviation plug pin numberCable color
15VEncoder +5v power1White
2GNDEncoder power ground2Brown
5SD+Serial communication signal +3Green
6SD-Serial communication signal -4Yellow
ShellShieldShield5-
----Battery+

6*

Pink 
----Battery-

7*

Black

✎Note: The color of the cable is subject to the actual product. The cables described in this manual are all cables of Wecon!

Servo Drive Control Input and Output Terminal Wiring

CN2 Pin Distribution

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Figure 4-12 VD3E servo driver control input and output pin distribution

Table 4-15 CN2 Interface Definition
Pin numberSignal namePin numberSignal name
1DO2-9DI1
2DO2+10DI3
3SS11DO3-
4DI212DO3+
5DI413-
6DO1-14DI6
7DO1+15DI5
8-  

Digital Input and Output Signals

Table 4-16 DI/DO signal description
Pin numberSignal nameDefault function
9DI1None
4DI2Fault and warning clear
10DI3Forward drive prohibition
5DI4Reverse drive prohibition
15DI5None
14DI6None
3SSPower input (12 ~ 24V)
6DO1-Rotation detection
7DO1+
1DO2-Fault signal
2DO2+
11DO3-Servo ready
12DO3+

1) Digital input circuit

Taking DI1 as an example, the interface circuits of DI1 ~ DI6 are exactly the same.

When the control device(HMI/PLC) is relay output

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Figure 4-13 Relay output

When the control device(HMI/PLC) is open collector output

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Figure 4-14 Open collector output

Digital output circuit

Taking DO1 as an example, the interface circuits of DO1 ~ DO3 are exactly the same.

When the control device(HMI/PLC) is relay input

image-20230626105836-11.png

Figure 4-15 Relay input

When the control device(HMI/PLC) is optocoupler input

image-20230626105836-12.png

Figure 4-16 Optocoupler input

Brake Wiring

The brake is a mechanism that prevents the servo motor shaft from moving when the servo drive is in a non-operating state, and keeps the motor locked in position, so that the moving part of the machine will not move due to its own weight or external force.

The brake input signal is non-polar, and the user needs to prepare 24V power supply. The standard connection diagram of brake signal BK and brake power supply is as follows:

image-20230626105836-13.png

Figure 4-17 VD3E brake wiring diagram

Communication Signal Wiring

The CN5 port of the first servo drive is connected to Wecon PLC LX6V

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Figure 4-18 Communication topology networking schema

Table 4-17 CN5\ CN6 interface definition
PinNameFunction description
1RX-Computer sends negative terminal (drive receives negative)
2RX+Computer sends terminal (drive receives positive)
3TX-Computer receives negative terminal (drive sends negative)
4GNDGround terminal
5Not usedNot used
6TX+Computer receives positive terminal (drive sends positive)
7--
8--