Electric strikes

Electric strikes Electric  strikes  are installed in  a  door  frame  where the  strike  plate is  usually  mounted.  It  includes  a  plate  called the keeper  or  gate which is  electrically  released  to  swing  out  and thereby  allows  the latch to  move through the  space the keeper  has  vacated.  There  are  several  different  types  of  electric  strikes.  Most  electric  strikes require  12  or  24  volts DC,  and they may be  fail-safe  or  fail-secure.  A  fail-safe  electric  strike  needs  power to  remain  locked,  and  is  not commonly  used.  The most  common  type of  electric  strike  is  fail-secure.  A  fail-secure electric  strike stays  locked even without  power  from  the outside  coming  in.  To  exit,  a  door  knob  or  lever  on the entry lockset  is  manually  operated. Since the  electric  strike  is  not  needed for  this,  it  allows for  safe  exit.  To  provide  an  audible  indication that  the  door  is unlocked,  DC-powered  electric  strikes  will  make  a  slight  click  when  operated.1  It should  be  noted  that  the  ESI Presence  Management  RFID  Reader emits  a  confirmation  tone  when  the door  control  relay is  operated;  therefore ESI  recommends that  a DC-powered  electric  strike  be  used  with  the RFID  Reader  for  door  access  control. Electromagnetic locks Electromagnetic  locks  (magnalocks) are  designed  to  secure  any type  of  door  or  gate  that  closes against  a  fixed stop. All  magnetic  locks  will  work  only  with  DC  current, usually  12  to  24  volts.  All  electromagnetic  locks are  fail-safe. This  means that  they  need  a  constant  source  of  current  to  remain  locked:  if  power is  removed,  the  lock  will open. All  electromagnetic  locks  are  silent,  even  when  powered  and locked.  The lock  consists  of  an  electromagnet  which mounts  on  the door  frame and  a  strike  plate which mounts  on the moving  door  or  gate.  The  strike plate is  mounted in such  a  way  that, when  the  door closes, it automatically  self-aligns  with  the  magnet. Magnetic  force  then  takes  over, strongly  securing  the door.  Release is  achieved  by  switching off  power  to  the magnet.  This  type  of  lock  secures the door from both entering and exiting, and there is no alternate method of unlocking the door. Important:  Electromagnetic locks can  be  dangerous  with  respect  to  fire  and smoke safety  if  not  installed properly. Because of  this,  installation of  this type of  lock  must  be done by  a licensed professional in most,  if  not  all,  areas. Before  planning an installation it's  very  important  to  always  check with  the Local  Authority  Having  Jurisdiction. Electric deadbolts Electric  deadbolts  come  in  several  different  styles,  and as  with  electric  strikes,  they  come  in  fail-safe and fail-secure configurations.  The  deadbolt  is  operated  via a  solenoid  in  the lock  housing.  Some  models  have  a manual  cylinder that  allows  exit  without  operating the  solenoid.  However,  because  electric  deadbolts  are installed  separate  from  a standard  entry  lockset,  they  can  be  as  dangerous  as  electromagnetic  locks  if  not  installed  properly.  Because  of this, installation of this type of lock must be done by a licensed professional in most if not all areas.