The troubleshooting of this system was mildly interesting, but the effort required to get the electric strike out of the frame ranks this job in the top ten of botched installs by others.
The customer wanted to re-use existing door hardware, while adding a new card reader connected to an existing access control system. An electric latch retraction upgrade for the exit bars was a key component of the plan.
These devices are used where only one door may be unlocked or open at one time. Unlocking or opening one door automatically secures all other doors within the designated area.