12/24V AC/DC. This Asec Mortice Release is dual monitored with both lock monitoring and door status monitoring contacts. Designed for use on doors up to 680Kg it is suitable for use on both timber and metal doors and, due to it's shallow depth, it is ideal for narrow applications. This is a versatile and reliable choice of release which is available as either fail locked or fail unlocked ,with reversible handing and to suit doors with cylindrical locks.. High security electric release. Dual monitored lock & cam. Fail-safe/fail-secure selectable. 12-24V AC/DC