{"product_id":"liftmaster-dynamic-brake-modification","title":"90-9214 Dynamic Brake Modification (M5 Mod)","description":"\u003cp class=\"richp\"\u003eProvides active electrical braking in the form of DC current to stop the motor. Acts as a stopping brake only, not a holding brake. This modification is considered most useful on gear-reduced door operators (GT, GH) where the gear reducer may help act as a holding brake or where a solenoid brake is not desired. It is also recommended for use when extremely high braking requirements are anticipated.May be used in conjunction with a solenoid brake. Normally provided in a separate wall-mounted enclosure to be mounted near, and field connected to the door operator. A dynamic brake is standard on NEMA 4, 12 rated (M103), NEMA 4X rated (M104), NEMA 7\/9 rated (M105) and Variable Speed (M37) modifications, and includes a Delay-on-Reverse Circuit (M60). Because of space requirements this modification cannot be used with many options without also adding a Wall-Mounted Starter. Must be factory installed. Starter panel modification only.\r\u003c\/p\u003e\u003cp class=\"richp\"\u003eNOTE: See NEMA 4 rated modifications for Logic 5.0 options.\u003c\/p\u003e","brand":"CHAMBERLAIN","offers":[{"title":"Default Title","offer_id":46371977953418,"sku":"90-9214","price":796.38,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.rsoperators.com\/products\/liftmaster-dynamic-brake-modification","provider":"R\u0026S Automation, Inc.","version":"1.0","type":"link"}