Main circuit wiring

Main circuit terminals

Figure 4-1 VD2A servo drive main circuit terminal distribution

Table 4-1 The name and function of VD2A servo drive main circuit terminal

VD2B servo drive main circuit terminal distribution

Figure 4-2 VD2B servo drive main circuit terminal distribution

Table 4-2 The name and function of VD2B servo drive main circuit terminal

VD2F servo drive main circuit terminal distribution

Figure 4-3 VD2F servo drive main circuit terminal distribution

Table 4-3 The name and function of VD2F servo drive main circuit terminal

Power wiring

VD2A drive single-phase 220V main circuit wiring

Figure 4-4 VD2A drive single-phase 220V main circuit wiring

VD2B drive single-phase 220V main circuit wiring

Figure 4-5 VD2B drive single-phase 220V main circuit wiring

VD2B drive three-phase 220V main circuit wiring

Figure 4-6 VD2B drive three-phase 220V main circuit wiring

VD2F drive single-phase 220V main circuit wiring

Figure 4-7 VD2F drive single-phase 220V main circuit wiring

Precautions for main circuit wiring

1. Do not connect the input power cord to the output terminals U, V, 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 easy to harden and break 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 line

Wecon VD2 series servo drive have 3 kinds of interface power cables: rectangular plug, aviation plug and in-line type.

Connector exterior	Terminal pin distribution	Pin description	Motor flange
		Rectangular plug Pin number Signal name Color 1 U Red 2 V White 3 W Black 4 PE Yellow-green	40 60 80
		Aviation plug Pin number Signal name Color 2 U Black 4 V Yellow-green 3 W Black 1 PE Black	110 130
		In-line type plug Pin number Signal name Color 3 U Red 1 V White 2 W Black 4 PE Yellow-green	60 80

Table 4-4 Power cable servo motor side connector

✎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 exterior		terminal pin distribution	Motor flange
WD series		Pin number Signal name 1 BR+ 2 BR-	40 60 80
WE series		Pin number Signal name 1 DC 24V 2 GND 3 -	80 110 130

Table 4-5 Brake device cable

Encoder cable connection of servo drive and servo motor

Figure 4-8 Encoder connection line wiring

Connector exterior	Terminal pin distribution	Pin description
		Pin number Signal name Pin number Signal name 1 5V 4 E- 2 GND 5 SD+ 3 E+ 6 SD-

Table 4-6 Encoder cable servo drive side connector

Table 4-7 Absolute value encoder line connector (Rectangular plug)

Table 4-8 Connection of encoder line pin

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 line is subject to the actual product. The lines described in this manual are all lines of Wecon!

Connector shape and terminal pin distribution		Motor flange
		110 130
Pin number Signal name 7 5V 5 GND 6 SD+ 4 SD- 1 Shield 3 Battery+ 2 Battery-

Table 4-9 Absolute value encoder line connector (Aviation plug)

Table 4-10 Absolute encoder cable connector (aviation socket)

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 encoder cable connector (in-line type)

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!

Servo drive control input and output wiring

CN2 pin distribution

VD2A and VD2B servo drive control input and output pin distribution (CN2 interface)

Figure 4-9 VD2A and VD2B servo drive control input and output pin distribution

Table 4-12 CN2 interface definition of VD2A and VD2B servo drive

VD2F servo drive control input and output pin distribution (CN2 interface)

Figure 4-10 VD2F servo drive control input and output pin distribution

Table 4-13 CN2 interface definition of VD2F servo drive

Wiring diagram of each mode

VD2A and VD2B servo drive

Figure 4-11 Wiring diagram of each mode

✎Note: Please refer to "4.4.1 Table 4-12 CN2 interface definition of VD2A and VD2B servo drive" for the pin numbers in the figure.

VD2F servo drive

Figure 4-12 Position pulse mode wiring

✎Note: Please refer to "4.4.1 Table 4-13 CN2 interface definition of VD2F servo drive" for the pin numbers in the figure.

Position instruction input signal

Table 4-14 Position instruction signal description

The instruction pulse and sign output circuit on the host device side can be selected from differential output or open collector output. The maximum input frequency is shown in the table.

Differential input

The connection of differential input is shown in Figure 4-9

Figure 4-13 VD2A and VD2B servo drive differential input connection

Figure 4-14 VD2F servo drive differential input connection

Open collector input

1.Open collector input connection

Figure 4-15 VD2A and VD2B servo drive open collector input connection

Figure 4-16 VD2F servo drive open collector input connection

2.NPN and PNP wiring

NPN	PNP
Figure 4-17 Triode Wiring

Analog input signal

The analog input signal is only supported by VD2A and VD2B servo drives.

Table 4-15 Analog input signal description

Figure 4-18 Analog input wiring

Digital input and output signals

VD2A and VD2B servo drives

Table 4-16 DI/DO signal description

Digital input circuit

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

Figure 4-19 Relay output

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

Figure 4-20 Open collector output

Digital output circuit

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

Figure 4-21 Relay input

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

Figure 4-22 Optocoupler input

VD2F servo drive

Table 4-17 DI/DO signal description

Digital input circuit

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

Figure 4-23 Relay output

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

Figure 4-24 Open collector output

Digital output circuit

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

Figure 4-25 Relay output

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

Figure 4-26 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-running state, so that the motor remains in position lock, so that the moving part of the machinery will not move due to self-weight or external force.

Brake input signal is no polar. You need to use 24V power . The standard wiring between brake signal BK and brake power is as below.

Figure 4-27 Brake wiring (three-phase 220V input)

Figure 4-28 Brake wiring (single-phase 220V input)

Communication signal wiring

Wecon VD2 series servo drive supports two communication modes: RS-422 and RS-485. The exterior of communication terminal is shown in Figure 4-29.

Figure 4-29 communication port exterior and pin definition

Communication signal connector

(1) VD2A and VD2B servo drive

The signal connectors exterior of RS422 and RS485 communication methods are shown in Figure 4-19 (a) and (b) respectively.

(2) VD2F servo drive

The CN3 and CN4 interfaces support RS422 and RS485 communication methods. The exterior of the communication signal connector is shown in Figure 4-31. Table 4-18 is the pin definition corresponding to the two communications.

Figure 4-31 VD2F servo drive communication signal connector exterior

Table 4-18 VD2F servo drive communication signal connector pin definition

Host computer communication connection

VD2A and VD2B servo drives communicate with the host computer via the CN3 interface by RS422 communication. Table 4-9 is the pin definition of the CN3 interface. The communication diagrams of VD2A and VD2B servo drives and host computer are shown in Figure 4-32 and Figure 4-33 respectively.

Table 4-19 The pin definition of CN3 interface

Figure 4-32 The Connection between VD2A drive and PC

Figure 4-33 The connection between VD2B drive and PC

VD2F servo drive communicates with the host computer via the CN3 or CN4 interface byRS422 communication. The communication diagrams of VD2F servo drive and host computer are shown in Figure 4-34 respectively.

Figure 4-34 The connection between VD2F drive and PC

PLC communication connection

VD2A and VD2B servo drives communicate with the PLC via CN5 or CN6 interface (located on the top of servo drive) by RS485 communication.

VD2F servo drive communicates with the PLC via CN3 or CN4 interface by RS485 communication.

Table 4-20 The pin definition of CN5/CN6 interface