The FS23M dual failsafe feature is available only from SDC. Conventional failsafe locking bolts rely solely on a spring to retract the bolt while the FS23M bolt will unlock with or without the assistance of the spring. This is the only electric bolt lock listed by the California State Fire Marshal for locking of perimeter entrance and emergency exitdoors after-hours.
Large repelling magnets are located within the bolt and strike. When power is interrupted the bolt is retracted and held back by a spring. Should the spring fail, repelling magnets eject the bolt from the strike, unlocking the door.
Name : SDC FS23MIU SpaceSaver Electric Bolt Lock, Narrow Mortise, Dual Failsafe, CSFM Listed for 1-3/4" Frame, Dull Stainless , Security Door Controls
Category : Deadbolts
UPC Code : 712905116303
Country of Origin : United States. Country of origin is subject to change.
ADI Part Number : SZ-FS23MIU
Brand Name : SDC
Manufacturer : Security Door Controls
Manufacturer Part Number : FS23MIU
Product Line : Spacesaver
Product Model : FS23MIU
Product Name : Spacesaver FS23MIU Electric Bolt Lock
Product Series : FS23M
Product Type : Electric Bolt Lock
Weight (Approximate) (g) : 907.185
Application/Usage : Door
Weight (Approximate) : 2 lb
Limited Warranty : 5 Year