Technical Specifications

FAQ

1. What is VW3M1C12 mainly used for?
VW3M1C12 is a Sub-D 50-pin connector designed for the CN1 I/O interface of Lexium 28 servo drives. It provides the physical connection between the servo drive and external control wiring, allowing controllers, switches, sensors, and other peripheral devices to exchange I/O signals with the drive. The connector is part of the Lexium connection accessory range and is intended for use with compatible LXM28 servo drive installations. During installation, the connector should be correctly positioned on the CN1 interface and the external wiring should follow the applicable I/O assignment.

2. What type of connector is VW3M1C12?
VW3M1C12 uses a Sub-D 50-pin connector configuration for the CN1 I/O interface of compatible Lexium 28 servo drives. The 50-pin interface provides multiple connection points for control and status signals within the servo system. Its plug-in design makes it suitable for connecting external control wiring to the drive while also allowing the connector to be removed during servicing or wiring maintenance. When installing the connector, the pin assignment should be checked carefully because each pin can have a specific I/O or control function.

3. What types of I/O signals can be connected through VW3M1C12?
VW3M1C12 provides access to the CN1 I/O interface of the Lexium 28 servo drive, which can be used for various control and status signals depending on the specific LXM28 configuration. These functions can include programmable digital inputs, fast capture inputs, safety-related STO signals, logic outputs, and pulse train output functions. The exact function of each pin depends on the servo drive model and its I/O configuration. For installation and commissioning, the actual pin assignment should always be checked against the corresponding Lexium 28 wiring documentation rather than relying only on the physical pin position.

4. Is VW3M1C12 compatible with Lexium 28 servo drives?
Yes. VW3M1C12 is designed for the CN1 I/O interface of compatible Lexium 28 servo drives. It provides the connector interface required to connect the drive with external I/O control wiring. Before installation, the complete LXM28 drive reference should be checked to confirm compatibility and ensure that the CN1 interface matches the connector. Because Schneider Electric uses different connector configurations across product families, VW3M1C12 should not be assumed to be interchangeable with connectors from other Lexium or Schneider Electric drive series.

5. How many connectors are included in a VW3M1C12 set?
The VW3M1C12 set contains three connectors. Each connector is intended for use with the CN1 I/O interface of a compatible Lexium 28 servo drive. The multi-piece package can be useful for installations involving several drives or for maintaining spare connectors for future service work. When ordering replacement parts, the required quantity should be calculated based on the number of servo drives and the expected maintenance requirements. The connector reference should also be checked before installation to make sure the replacement part corresponds to the drive’s CN1 interface.

6. What should be checked if I/O signals become abnormal after installing VW3M1C12?
If I/O signals behave abnormally after installing VW3M1C12, first check that the connector is fully inserted into the CN1 interface and that its fixing mechanism is properly secured. Inspect the 50-pin connector for bent pins, contamination, loose contacts, or visible mechanical damage. The external wiring should then be checked against the correct CN1 pin assignment to identify possible wiring errors, short circuits, or open circuits. If the physical wiring is correct, review the servo drive’s I/O configuration and control parameters. Digital inputs, outputs, fast capture functions, and safety-related signals must be configured consistently with the actual wiring for the system to operate correctly.

7. What precautions should be taken when wiring VW3M1C12 to a Lexium 28 servo drive?
Before wiring the connector, the servo drive should be safely isolated from power according to the applicable machine safety procedures. Each CN1 pin should be identified from the correct Lexium 28 wiring documentation before a conductor is connected. Special care should be taken to avoid mixing control signals, power-related connections, and safety-related signals. After the Sub-D 50-pin connector is inserted into the CN1 interface, it should be properly secured so that vibration during machine operation cannot cause the connection to loosen. Signals associated with the STO safety function require particular attention because incorrect wiring can affect the safety function of the drive. After wiring is completed, individual I/O functions should be tested before normal machine operation.

8. What are the common causes of poor contact with VW3M1C12?
Poor contact can result from incomplete connector insertion, insufficient mechanical fastening, bent pins, contamination, excessive cable tension, or repeated vibration during machine operation. If the servo drive experiences intermittent I/O signal loss, unexpected input changes, or unstable control signals, the CN1 connector and its associated wiring should be inspected first. After safely isolating the equipment, check the condition of the 50-pin interface and make sure the connector is correctly positioned and secured. The cable should also be checked for excessive pulling or mechanical stress. If the connector has damaged pins or other significant mechanical defects, replacing it with a suitable VW3M1C12 connector is preferable to modifying or forcing the damaged connector back into service.