{"product_id":"abb-vm19-voltage-monitoring-relay","title":"ABB VM19 Voltage Monitoring Relay","description":"\u003cdiv\u003e\u003cp\u003eThe ABB VM19 Mechanical Interlock Unit is a mounting accessory for ABB AF-series low-voltage contactors that provides a mechanical interlock between two adjacent, equal-size contactors to prevent simultaneous energization. It is designed for contactors AF116 through AF370, and is commonly ordered as 1SFN030300R1000. When installed between two equal-frame contactors, the VM19 enforces sequential operation, making it ideal for motor-control panels and circuits that require interlocked switching or reversal configurations. Being a purely mechanical device, it does not rely on electrical signals to function and integrates with ABB’s interlock accessories to deliver a compact, maintenance-free solution within ABB low-voltage switchgear. Typical applications include safeguarding dual-contactor starters in machinery and process lines where one contactor must remain de-energized while the other operates, ensuring safe handover and preventing both contacts from closing at once. The VM19 interlock complements ABB’s AF-series ecosystem, helping to simplify panel wiring and improve safety without additional control logic. Compact form factor suits tight enclosures.\u003c\/p\u003e\u003c\/div\u003e","brand":"ABB","offers":[{"title":"New","offer_id":51656704590126,"sku":null,"price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_63a3d1cf-c0b0-4700-830f-1589593be271.jpg?v=1769462802","url":"https:\/\/plgautomation.com\/products\/abb-vm19-voltage-monitoring-relay","provider":"PLG Automation ","version":"1.0","type":"link"}