The M400 Series line of electromagnetic locks from Schlage are designed with the customer in mind to be robust, easy to install, and secure. The new bayonet mounting feature makes installs easier,allowing the installer to have their hands free during the mounting process. There is no need to consider door handing as all the M400 Series electromagnetic locks are both non-handed and symmetrical, allowing optimum placement of the magnet no matter the application.All M400 Series locks have automatic voltage sensing for 12 and24 volts along with polarity protectionto makewiringless complex. The M490is tested and certifiedto meetor exceed UL1034 680kg hold force requirementsTheM490 electromagnetic lock comes in two configurations to meet your specific security needs. The M490 provides basic security,while the M490P,which is our standard option, provides intelligent sensing and reporting features needed to integrate with access control systems.