The HBL1283S is a heavy duty high security electric locking mechanisms designed for door closure without using any power and in the event ofpower failure itopens by power switch or manual release key cylinder. The unit static force hold to 800kg. It monitors the correct door closing position sending alarm indication when not correctly align. The tampering action works to engaged the lock bolt, overcoming the possibility of bolt retraction with an alarm sounding. The device can be inter-phased with access control system to control access and egress with DSS, LSS and alarm sensors to provide high security monitoring.