SD-995C Seco-Larm Fail-Secure or Fail-Safe Electric Door Strike for Metal Doors 12VDC

[Music] in the world of electrified door hardware knowing the difference between fail secure and failsafe is important these two terms are used to describe how the door works from the key side with the presence or the removal of electrical power to the locking mechanism let's start with their definitions fail secure products are locked from the outside when they are not getting power this means when power is cut say because of severe weather the fail secure product is locked this also means to unlock a fail secure product power must be applied failsafe products are unlocked from the outside when they are not getting power this means when power is cut say because of severe weather the failsafe product is unlocked this also means to lock a failsafe product power must be applied some electrified hardware has always fail secure such as the von dooper an electric latch retraction exit device