04 Wiring

Last modified by Jim on 2024/07/30 10:16

Main circuit wiring

Main circuit terminals

VD2A servo drive main circuit terminal distribution

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Single-phase 220V AC input is connected to L1 and L3.
L2
L3
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C;
C
D
U	Motor power line terminal	Connect with the U, V and W of motor to power the motor.
V
W
Ground terminal	Ground terminal	Grounding treatment of the servo drive.

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

VD2B servo drive (220V) main circuit terminal distribution

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_17042d8c7761266a.gif — Figure 4-2 VD2B servo drive (220V) main circuit terminal distribution

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Three-phase 220V AC input is connected to L1, L2, L3; Single-phase 220V AC input is connected to L1 and L3.
L2
L3
L1C	Control power input terminal	Single-phase 220V AC input is connected to L1C and L2C.
L2C	Control power input terminal	Single-phase 220V AC input is connected to L1C and L2C.
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C.
C
D
U	Motor power line terminal	Connect with the U, V and W of motor to power the motor.
V
W
Ground terminal	Ground terminal	Grounding treatment of the servo drive.

Table 4-2 The name and function of VD2B servo drive (220V) main circuit terminal

VD2B servo drive (380V) main circuit terminal distribution

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Three-phase 380V AC input is connected to L1, L2, L3;
L2
L3
L1C	Control power input terminal	Single-phase 380V AC input is connected to L1C and L2C.
L2C	Control power input terminal	Single-phase 380V AC input is connected to L1C and L2C.
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C.
C
D
U	Motor power line terminal	Connect with the U, V and W of motor to power the motor.
V
W
Ground terminal	Ground terminal	Grounding treatment of servo drive.

Table 4-3 The name and function of VD2B servo drive (380V) main circuit terminal

Figure 4-4 VD2C servo drive (380V) main circuit terminal distribution

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Three-phase 380V AC input is connected to L1, L2, L3;
L2
L3
L1C	Control power input terminal	Single-phase 380V AC input is connected to L1C and L2C.
L2C	Control power input terminal	Single-phase 380V AC input is connected to L1C and L2C.
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C.
C
D
U	Motor power line terminal	Connect with the U, V and W of motor to power the motor.
V
W
Ground terminal	Ground terminal	Grounding treatment of servo drive.

Table 4-4 The name and function of VD2C servo drive (380V) main circuit terminal

VD2F servo drive main circuit terminal distribution

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_6dd68f214c0f9f79.gif — **Figure 4-5 VD2F servo drive main circuit terminal distribution**

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Connect single-phase 220V input power
L2	Power input terminal	Connect single-phase 220V input power
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C.
C
D
P+	Common DC bus terminal	DC bus terminal of servo drive
N	Common DC bus terminal	DC bus terminal of servo drive
U	Motor power line terminal	Connect with the U, V and W of the motor to power the motor.
V
W
PE	Ground terminal	Grounding treatment of the servo drive.

Table 4-5 The name and function of VD2F servo drive main circuit terminal

Figure 4-6 VD2L servo drive main circuit terminal distribution

Terminal number	Terminal name	Terminal function
L1	Power input terminal	Connect single-phase 220V input power
L2
P+	Braking resistor terminal	Use internal braking resistor: short-circuit C and D. Use external braking resistor: Please disconnect the short wire between C and D, and then connect the external braking resistor between P+ and C.
C
D
P+	Common DC bus terminal	DC bus terminal of servo drive
N
U	Motor power line terminal	Connect with the U, V and W of the motor to power the motor.
V
W
PE	Ground terminal	Grounding treatment of the servo drive.

Table 4-6 The name and function of VD2L servo drive (380V) main circuit terminal

Power wiring

Use single-phase 220V power supply model: VD2-010SA1G and VD2-014SA1G

**Figure 4-7 VD2A drive single-phase 220V main circuit wiring**

Use single-phase 220V power supply model: VD2-016SA1G and VD2-019SA1G

**Figure 4-8 VD2B drive single-phase 220V main circuit wiring**

Use three-phase 220V power supply model: VD2-021SA1G, VD2-025SA1G and VD2-030SA1G

**Figure 4-9 VD2B drive three-phase 220V main circuit wiring**

Use single-phase 220V power supply model: VD2F-010SA1P、VD2F-014SA1P

**Figure 4-10 VD2F/VD2L drive single-phase 220V main circuit wiring**

Use three-phase 380V power supply model: VD2-021TA1G

**Figure 4-11 VD2B/VD2C drive three-phase 380V main circuit wiring**

Precautions

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).
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.
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.
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

Power line

Wecon VD2 series servo drives 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

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_9335f5058d76f79a.gif

Aviation plug

Pin number	Signal name	Color
2	U	Black
4	V	Yellow-green
3	W	Black
1	PE	Black

110

130

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_77117dacdd5935b9.gif

In-line type plug

Pin number	Signal name	Color
3	U	Red
1	V	White
2	W	Black
4	PE	Yellow-green

Table 4-7 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-

WE series

Pin number	Signal name
1	DC 24V
2	GND
3	-

110

130

Encoder cable connection

✎ Note: It is recommended that the encoder cable should not exceed 10m, otherwise it may cause an error A93.

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_2a7019b4f21f159e.gif — **Figure 4-12 Encoder connection line wiring**

Connector exterior

Terminal pin distribution

Pin description

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_c798aa1eac035779.gif

Pin number	Signal name	Pin number	Signal name
1	5V	4	-
2	GND	5	SD+
3	-	6	SD-

Table 4-8 Encoder cable servo drive side connector

Connector exterior and terminal pin distribution

Motor flange

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_a41c00ba1133ea20.png

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_4cb7be8f7bd5893e.gif

Pin number	Signal name
7	5V
8	GND
4	SD+
5	SD-
3	Shield
1	Battery+
2	Battery-

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

Drive side J1394		Description	Motor side
Pin number	Signal name	Description	Rectangular plug pin number	Cable color
1	5V	Encoder +5v power	7	Blue
2	GND	Encoder power ground	8	Orange
5	SD+	Serial communication signal +	4	Green
6	SD-	Serial communication signal -	5	Brown
Shell	Shield	Shield	3	--
-	-	Battery+	1*	Pink
-	-	Battery-	2*	Pink-Black

Table 4-10 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.

企业微信截图_16606338254815.png

✎ 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

Wecon VD2 SA Series Servo Drives Manual (Full V1.1)_html_d450a92cc1507fcd.png

110

130

Pin number	Signal name
7	5V
5	GND
6	SD+
4	SD-
1	Shield
3	Battery+
2	Battery-

Table 4-11 Absolute value encoder line connector (Aviation plug)

Drive side J1394		Description	Motor side
Pin number	Signal name	Description	Aviation plug pin number	Cable color
1	5V	Encoder +5v power	7	Blue
2	GND	Encoder power ground	5	Orange
5	SD+	Serial communication signal +	6	Green
6	SD-	Serial communication signal -	4	Brown
Shell	Shield	Shield	1	-
-	-	Battery+	3*	Pink
-	-	Battery-	2*	Pink-Black

Table 4-12 Absolute encoder cable connector (Aviation socket)

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

Connector shape and terminal pin distribution

Motor

flange

Pin number	Signal name
7	5V
5	GND
6	SD+
4	SD-
1	Shield
3	Battery+
2	Battery-

Table 4-13 Absolute encoder cable connector (in-line type)

Drive side J1394		Description	Motor side
Pin number	Signal name	Description	In-line plug pin number	Cable color
1	5V	Encoder +5v power	7	Blue
2	GND	Encoder power ground	5	Orange
5	SD+	Serial communication signal +	6	Green
6	SD-	Serial communication signal -	4	Brown
Shell	Shield	Shield	1	-
-	-	Battery+	3*	Brown
-	-	Battery-	2*	Black

Table 4-14 Connection of encoder line pin

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

Connector shape and terminal pin distribution

Motor flange

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Pin number	Signal name
1	5V
2	GND
3	SD+
4	SD-
5	Shield
6	Battery+
7	Battery-

Table 4-15 Absolute encoder cable connector (in-line type)

Drive side J1396		Description	Motor side
Pin number	Signal name	Description	In-line plug pin number	Cable color
1	5V	Encoder +5V power	1	White
2	GND	Encoder power ground	2	Brown
5	SD+	Serial communication signal +	3	Green
6	SD-	Serial communication signal -	4	Yellow
Shell	Shield	Shield	5	-
-	-	Battery+	6*	Pink
-	-	Battery-	7*	Black

Table 4-16 Connection of encoder line pin

✎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)

企业微信截图_16841152769709.png — **Figure 4-13 VD2A and VD2B servo drive control input and output pin distribution**

Pin number	Signal name	Pin number	Signal name	Pin number	Signal name
1	-	16	GND	31	-
2	AI_2+	17	GND	32	AI_1+
3	AI_2-	18	-	33	AI_1-
4	DO1-	19	DO3-	34	GND
5	DO1+	20	DO3+	35	-
6	DO2-	21	DO4-	36	-
7	DO2+	22	DO4+	37	-
8	SS	23	DI5	38	-
9	DI1	24	DI6	39	-
10	DI2	25	DI7	40	SIGN-
11	DI3	26	DI8	41	SIGN+
12	DI4	27	GND	42	PULS-
13	PAO-	28	PAO+	43	PULS+
14	PBO-	29	PBO+	44	PL
15	PZO-	30	PZO+	--	--

Table 4-17 CN2 interface definition of VD2A and VD2B servo drive

VD2-0xxSA1H drive control input and output pin distribution (CN2 interface)

Figure 4-14 VD2-0xxSA1H servo drive control input and output pin distribution

Pin number	Signal name	Pin number	Signal name	Pin number	Signal name
1	--	16	--	31	--
2	--	17	--	32	--
3	--	18	--	33	--
4	DOCOM	19	DOCOM	34	--
5	DO1+	20	DO3+	35	DOCOM
6	DOCOM	21	DOCOM	36	--
7	DO2+	22	DO4+	37	24V
8	SS	23	DI5	38	--
9	DI1	24	DI6	39	--
10	DI2	25	DI7	40	SIGN-
11	DI3	26	DI8	41	SIGN+
12	DI4	27	--	42	PULS-
13	--	28	--	43	PULS+
14	--	29	--	44	PL
15	--	30	--	--	--

Table 4-18 CN2 interface definition of VD2-0xxSA1H servo drive

VD2F and VD2L servo drive control input and output pin distribution (CN2 interface)

企业微信截图_16841172129995.png — **Figure 4-15 VD2F and VD2L servo drive control input and output pin distribution**

Pin number	Signal name	Pin number	Signal name	Pin number	Signal name
1	DO3	6	DO4	11	PL
2	DO1	7	DO2	12	PULS+
3	SS	8	DOCOM	13	PULS-
4	DI3	9	DI4	14	SIGN+
5	DI1	10	DI2	15	SIGN-

Table 4-19 CN2 interface definition of VD2F and VD2L servo drive

Wiring diagram

VD2A, VD2B and VD2C servo drive

✎Note: Please refer to "Table 4-17 CN2 interface definition of VD2A and VD2B servo drive" for the pin numbers in the figure.

VD2-0xxSA1H servo drive

企业微信截图_16841183152287.png — Figure 4-17 VD2-0xxSA1H servo drive control input and output pin distribution

✎Note: Please refer to "Table 4-14 CN2 interface definition of VD2-0xxSA1H servo drive" for the pin numbers in the figure.

VD2F servo drive

**Figure 4-18 Position pulse mode wiring**

✎Note: Please refer to "Table 4-19 CN2 interface definition of VD2F servo drive" for the pin numbers in the figure.

VD2L servo drive


	Figure 4-19 Position pulse mode wiring

✎Note: Please refer to "4.4.1 Table 4-19 CN2 interface definition of VD2F and VD2L servo drive" for the pin numbers in the figure.

Position instruction input signal

Signal name	VD2A and VD2B pin number	VD2F pin number	Function
PULS+	43	12	Low-speed pulse input modes: differential input, open collector. There are three types of input pulse: Direction + pulse (positive logic); CW/CCW(VD2F and VD2L not support yet); A and B phase quadrature pulses (4 times frequency).
PULS-	42	13
SIGN+	41	14
SIGN-	40	15
PL	44	11	External power input interface for instruction pulse.

Table 4-20 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.

Pulse method	Difference	Open collector
Maximum frequency	500KHz	200KHz

Differential input

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

**Figure 4-21 VD2F servo drive differential input connection**

Open collector input

Open collector input connection

**Figure 4-23 VD2F servo drive open collector input connection**

NPN and PNP wiring


NPN	PNP
Figure 4-24 Triode Wiring

Analog input signal

The analog input signal is only supported by VD2A, VD2B and VD2C servo drives.

Pin number	Signal name	Function
32	AI_1+	AI_1 analog input signal, resolution 12-bit. Input voltage range: -10V to +10V.
33	AI_1-
2	AI_2+	AI_2 analog input signal, resolution 12-bit. Input voltage range: -10V to +10V.
3	AI_2-
17	GND	Analog input signal ground.
34	GND	Analog input signal ground.

Table 4-21 Analog input signal description

Digital input&output signals

VD2A, VD2B and VD2C servo drives

Pin number	Signal name	Default function
9	DI1	Servo enable
10	DI2	Faults and alarms clearance
11	DI3	Forward drive prohibited
12	DI4	Reverse drive prohibited
23	DI5	Inverted instruction
24	DI6	Instruction pulse prohibited input
25	DI7	Not used
26	DI8	Not used
8	SS	24V
4	DO1-	Rotation detection
5	DO1+	Rotation detection
6	DO2-	Faults signal
7	DO2+	Faults signal
19	DO3-	Servo is ready
20	DO3+	Servo is ready
21	DO4-	Positioning completed
22	DO4+	Positioning completed

Table 4-22 DI/DO signal description

Digital input circuit

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

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

Digital output circuit

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

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

VD2-0xxSA1H servo drives

Pin number	Pin name	Default function
9	DI1	Servo enable
10	DI2	Fault and alarm clearance
11	DI3	Forward drive prohibited
12	DI4	Reverse drive prohibited
23	DI5	Inverted command
24	DI6	command pulse prohibited input
25	DI7	Not used
26	DI8	Not used
8	SS	Power input (24V)
5	DO1+	Fault signal
7	DO2+	Pulse frequency division output (Z phase)
20	DO3+	Pulse frequency division output (A phase)
22	DO4+	Pulse frequency division output (B phase)
4/6/19/21/35	DOCOM	DO Power Common (0V)
37	24V+	DO power input (24V)

Table 4-23 DI/DO signal description

Digital output circuit

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

企业微信截图_16841196784478.png — **Figure 4-30 Relay input**

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

The digital output circuit wiring of VD2-0xxSA1H Servo Drive is different from that of VD2A and VD2F servo drives. VD2-0xxSA1H needs to be connected to external 24V DC power supply. (CN2_35 pin and CN2_37 pin are connected to COM0 and 24V+ of external 24V power supply respectively). If the access current is too large and the DOCOM line is relatively thin, servo drives need to access multiple DOCOM to achieve the shunt effect.

VD2F servo drive

Pin number	Pin name	Default function
5	DI1	Servo enable
10	DI2	Faults and alarms clearance
4	DI3	Forward drive prohibited
9	DI4	Reverse drive prohibited
3	SS	24V
2	DO1	Rotation detection
7	DO2	Fault signal
1	DO3	Servo is ready
6	DO4	Positioning completed
8	DOCOM	Do common terminal

Table 4-24 DI/DO signal description

Digital input circuit

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

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

Digital output circuit

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

When the control device (HMI/PLC) is 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.

The 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 4-36 Brake wiring of VD2A and VD2B**

企业微信截图_16841228463340.png — **Figure 4-37 Brake wiring of VD2-0xxSA1H**

Communication signal wiring

Wecon VD2 series servo drive supports two communication modes: RS-422 and RS-485. The communication port is RJ45 socket. The exterior of communication terminal is shown in Figure 4-31

**Figure 4-39 Pin number of an RJ45 socket**

The communication modes supported by the driver communication ports are in the following table.

VD2 A&VD2 B		VD2F
Port	Communication mode	Port	Communication mode
CN3	Only RS422	CN3	RS422, RS485 communication mode choose one of two. Set by function code P12-05
CN5	Only RS485	CN4
CN6	Only RS485	✎Note: The CN3 and CN4 interfaces are physically connected and are actually the same communication interface. When P12-05 is set to 1, CN3 and CN4 use RS485 communication mode. If the value is set to 0, both use RS422 communication mode.
✎Note: The CN5 and CN6 interfaces are physically connected and are actually the same communication interface.

Table 4-25 Communication port communication modes

Communication connection with servo host computer (RS422)

Servo drives communicate with the host computer via RS422 communication. A USB to RS422 (RJ45 connector) cable is required for communication, and you need to equip it by yourselves.

VD2A&VD2B

VD2A and VD2B servo drives communicate with the host computer via the CN3 interface by RS422 communication. Figure 4-36 and Figure 4-37 show the communication connections.

**Figure 4-40 The Connection between VD2A drive and PC**

**Figure 4-41 The connection between VD2B drive and PC**

Pin	Name	Function description
1	RX-	Computer sends negative terminal (drive receives negative)
2	RX+	Computer sends positive terminal (drive receives positive)
3	TX-	Computer receives negative terminal (drive sends negative)
4	GND	Ground terminal
5	NC	Not used
6	TX+	Computer receives positive terminal (drive sends positive)
7	NC	Not used
8	NC	Not used

Table 4-26 VD2A and VD2B pin definitions for CN3

VD2F

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 4-38.

**Figure 4-42 The connection between VD2F drive and PC**

Pin	Name	Function description
1	RX-	Computer sends negative terminal (drive receives negative)
2	RX+	Computer sends positive terminal (drive receives positive)
3	TX-	Computer receives negative terminal (drive sends negative)
4	GND	Ground terminal
5	NC	Not used
6	TX+	Computer receives positive terminal (drive sends positive)
7	NC	Not used
8	NC	Not used

Table 4-27 VD2F pin definitions for CN3/CN4 interfaces

VD2L

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 4.43.

Figure 4-43 The connection between VD2F drive and PC

Communication connection with PLC and other device (RS485)

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

Pin	Name	Function description
1	485-	Computer sends negative terminal (drive receives negative)
2	485+	Computer sends positive terminal (drive receives positive)
3	NC	Not used
4	GND	Ground terminal
5	GND	Ground terminal
6	NC	Not used
7	Reserved	Reserved
8	GND	Ground terminal

Table 4-28 VD2A, VD2B and VD2C pin definition of CN5/CN6 interface

VD2F and VD2L servo drives communicate with PLC and other devices for Modbus via CN3 or CN4 interface (located on the top of servo drive) by RS485 communication.

Pin	Name	Function description
1	485-	Computer sends negative terminal (drive receives negative)
2	485+	Computer sends positive terminal (drive receives positive)
3	-	Computer receives negative terminal
4	GND	Ground terminal
5	-	Not used
6	-	Computer receives positive terminal
7	-	Not used
8	-	Not used

Table 4-29 VD2F and VD2L pin definition of CN3/CN4 interfaces

04 Wiring

Main circuit wiring

Main circuit terminals

Power wiring

Precautions

Power line connection

Power line

Brake device cable

Encoder cable connection

Servo drive control input and output wiring

CN2 pin distribution

Wiring diagram

Position instruction input signal

Analog input signal

Digital input&output signals

Brake wiring

Communication signal wiring

Communication connection with servo host computer (RS422)

Communication connection with PLC and other device (RS485)

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