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ABB vm140/190 mechanical interlock unit
ABB VM140/190 mechanical interlock unit designed for interlocking ABB AF116 to AF205 contactors in industrial reversing motor starter applications.
£16.87
Why Choose the ABB 1SFN034403R1000 VM140/190 Mechanical Interlock Unit?
The ABB 1SFN034403R1000, also known as the VM140/190, is a robust mechanical interlock unit designed for use with ABB AF series contactors. It provides a reliable mechanical interlocking function between two compatible contactors, preventing both devices from closing simultaneously and ensuring safe operation in reversing motor starters and changeover applications.
Designed for industrial automation, machine builders and OEM panel manufacturers, the VM140/190 installs directly between two side-by-side contactors. Its compact design eliminates the need for complex external interlocking mechanisms while improving operational safety, reducing installation time and ensuring dependable long-term performance in demanding industrial environments.
Compatible with ABB AF116 to AF205 contactors, including interlocking AF116 to AF146 with AF190 to AF205, the ABB 1SFN034403R1000 is the ideal accessory for reversing starters, transfer switching systems and industrial motor control assemblies.
Key Advantages
- Provides reliable mechanical interlocking between two contactors.
- Prevents simultaneous closing of both contactors.
- Designed for ABB AF116 to AF205 contactors.
- Suitable for reversing and changeover motor starter assemblies.
- Compact design allows straightforward installation.
- Improves operational safety and system reliability.
Key Features
- ABB VM140/190 mechanical interlock unit.
- Part number 1SFN034403R1000.
- Mechanical interlock accessory.
- Designed for two compatible contactors.
- Compatible with AF116...AF205 contactors.
- Allows interlocking of AF116...AF146 with AF190...AF205.
- Compact side-by-side installation.
- Maintenance-free mechanical operation.
- Robust industrial construction.
- Suitable for industrial motor control systems.
Safe Mechanical Interlocking for Industrial Contactors
Mechanical interlock units are essential in reversing starters and transfer switching applications where two contactors must never close simultaneously. The ABB VM140/190 provides a dependable mechanical locking mechanism that physically prevents simultaneous operation, helping protect motors, power circuits and connected equipment.
Its durable construction and direct mounting arrangement enable panel builders and OEM manufacturers to create compact, reliable motor control systems while maintaining high standards of operational safety and long-term reliability.
Typical Applications
- Reversing motor starters.
- Forward and reverse motor control.
- Industrial control panels.
- Automatic transfer and changeover systems.
- Machine building.
- OEM automation equipment.
- Industrial switchgear assemblies.
Technical Specifications
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| Device Type | Accessory | |
|---|---|---|
| Series | VM Mechanical Interlock Units | |
| Part number | 1SFN034403R1000 | |
| Product type | Mechanical interlock unit | |
| Application | Reversing and changeover contactor interlocking | |
| Compatible contactors | AF116, AF140, AF146, AF190, AF205, AF116B, AF140B, AF146B, AF190B, AF205B | |
| Mounting type | Side-by-side contactor mounting | |
| Connection compatibility | Screw terminal contactors | |
| Construction | Industrial insulated thermoplastic and metal mechanism | |
| Protection function | Prevents simultaneous contactor operation | |
| Dimensions (W × H × D) | approx. 30 × 84.9 × 41.8 mm | |
| Weight | approx. 0.09 kg | |
| Standards | EN 60947-4-1, UL 60947-4-1 |
Frequently Asked Questions
What is the ABB 1SFN034403R1000 used for?
It is a mechanical interlock unit that prevents two compatible ABB contactors from closing simultaneously in reversing and changeover applications.
Which contactors is the VM140/190 compatible with?
It is designed for ABB AF116 to AF205 contactors and supports interlocking AF116 to AF146 with AF190 to AF205 contactors.
Why is a mechanical interlock required?
Mechanical interlocking prevents simultaneous operation of reversing or transfer contactors, protecting motors and electrical systems from short circuits and equipment damage.
Does the VM140/190 require electrical wiring?
No. The unit operates purely mechanically and requires no electrical connections.
Where is the VM140/190 typically installed?
It is mounted directly between two compatible ABB contactors in reversing motor starters and industrial transfer switching assemblies.
Trusted by Industrial Automation Professionals
ABB VM mechanical interlock units are trusted by panel builders, OEM manufacturers and automation engineers for delivering dependable mechanical interlocking, enhanced operational safety and reliable long-term performance in industrial motor control systems.
