555 PLUS Series - Fail safe dropbolts

The 555 PLUS Series narrow stile fail safe dropbolts allow internal doors to be closed securely during normal use and unlocked immediately during emergency situations.

Mechanical operation is by means of a key or knob, and electronic operation by means of an electrical impulse. It can be mounted either vertically or horizontally.

The lock is prepared for the insertion of a Euro-profile cylinder and disarms the moment the power supply is interrupted, allowing free access through escape routes.

The semi-cylindrical deadbolt is made of saw-proof carbonitrided steel, while a magnetic sensor located inside and/or outside the dropbolt allows the status of the door to be monitored at all times.

The lock's electronic components are in SMT microprocessor technology. This enables protection against polarity reversal through the following functions:

• Opening command from the NO button.
• In the event of a power failure, the bolt of the normally unlocked lock remains retracted, guaranteeing the possibility of exit.
• Automatic reclosing adjustable from 1 to 5 seconds when the door leaf is approached, and from 1 to 3 minutes if the leaf is not opened.
• Prepared for cascade connection to achieve operation of up to 4 interlocked doors.

Finish: Stainless steel