Rutherford Controls (RCI), 8310 DSS x 28, MultiMag Electromagnetic Lock, Single Magnet, Door Status Sensor, Brushed Anodized Aluminum (Standard)Features:Keyhole mounting for ease of installationBuilt-in time delay (instant release with adjustable relock, programmable from 0-90 seconds)Convenient plug-in wiring terminalsEasy-access wiring cavityStabilizing 4-bolt "drop stop" mountingSurge protectionDesigned to overcome residual magnetism230mA Auto-Sensing 12-24VDC (Max at 12VDC)Up to 1,200lbf Holding Force (Each Electromagnet)Fail-SafeCAN/ULC S104 UL 10C 1-1/2-HoursHardened steel armature nutSelf-drilling Teks® fastenersUL 294 Special Locking Arrangement Component (6th Edition)CAN/ULC S104 Auxiliary Locks Listed for fire doors rated up to 1-1/2-hoursUL 10C Auxiliary Locks Listed for fire doors rated up to 1-1/2-hoursCalifornia State Fire Marshal Listed (CSFM: 3774-2127:0100)The MultiMag® series of electromagnetic locks are designed for easy installation and multi-purpose operation for interior or perimeter doors. The mounting bracket has keyhole mounting to support the magnet, freeing the installer's hands to affix the magnet mounting screws. The removable cavity cover offers quick, easy access to wiring. The RCI 8310 MultiMag® applies to single outswinging doors, while the RCI 8320 MultiMag® is for double outswinging doors. For additional security monitoring these electromagnetic locks offer optional door status & security condition sensors.DSS – Door Status Sensor Magnet-reed type sensor for remote indication of door status (opened or closed) independent of local power. Magnet embedded in armature for tamper resistance; reed switch inside electronic housing cavity for easy access.Applications:Single outswinging doorsSingle inswinging doors (use with Z bracket sold separatly)Interior or Perimeter doorsGovernment FacilitiesOffice ComplexesWarehousesRetailCommercialIndustrialHealth Care.