Overview
The ABB VM5-1 mechanical interlock (part number 1SBN030100R1000) is a robust mechanical locking unit for the safety and control of dual-contactor systems in industrial automation. VM5-1 is a mechanical interlock unit used for the mechanical interlocking of two contactors of the A contactor serie, in the case of reversing contactors, changeover contactors or star-delta starters. This compact auxiliary component ensures that two main contactors cannot be energized simultaneously, a critical safety requirement in motor control and reversing applications.
Key Features
- Mechanical locking prevents simultaneous contactor closure
- For use with A/AE/AL9-40 Contactors
- Suitable for reversing starters, changeover contactors, and star-delta configurations
- Compact, lightweight design for easy mounting
- No auxiliary contacts required for operation
- Industry-standard compatibility across ABB contactor families
Technical Specifications
The VM5-1 is engineered for dependable performance in demanding industrial environments:
- Part Number: 1SBN030100R1000
- Model: VM5-1
- Type: Mechanical Interlock Unit
- Mounting: Direct attachment to A-series contactors
- Weight: 0.066 kg
- Operating Principle: Mechanical cam-based locking
- Certification: CE compliant; UL Certificate of Compliance available
Typical Applications
The VM5-1 interlock excels in:
- Reversing starters: Prevents forward/reverse contactor simultaneous closure
- Star-delta starters: Ensures safe transition between connection types
- Changeover control: Manages dual-source motor power applications
- Motor soft-start systems: As a safety backup in bypass configurations
- Industrial machinery control: Cranes, pumps, fans, and compressors
Compatibility & Replacements
The VM5-1 interlock is designed for seamless integration with ABB’s A-series contactor range. Compatible contactors include A9, A16, A26, A40, and their AE (auxiliary contact-equipped) variants (AE9–AE40). The unit is a direct replacement for existing VM5-1 applications and is stocked as a genuine ABB part in new condition. Engineers specifying reversing or star-delta starters should verify their main contactor series before ordering to ensure mechanical compatibility. This genuine OEM component delivers the reliability and safety margins required in critical industrial control circuits.
