The GRI410PWG (NO), GRI411PWG (NC) and GRI4400A Magnetic Contact Switches provide a way to inform and control UPB modules upon the opening and closing of garage doors, entry doors, windows etc.  Use these switches with a Web Mountain CM-01 IO Module to convert contact openings and closures to UPB signals.  The GRI410PWG (NO) and GRI411PWG (NC) switches come in a plastic case and are the economical alternatives. The GRI4400A comes in a metal case and is meant for robust applications.

The GRI410PWG is a Normally Open (NO) contact switch while the GRI411PWG is a Normally Closed (NC) contact switch.