Description The Aperta A1SLS is a fail-secure surface strike lock designed for access control systems on single and double doors. The lock body mounts to the door frame surface with screws through five fixing holes, and the 123mm x 70mm x 50mm body sits flush against the frame edge. When powered at 12VDC the lock releases, allowing the door to open. When power is removed or fails, the lock engages and secures the door. Fail-secure operation suits high-security applications where the door must remain locked during power outages, fire alarm activations, or system failures. The lock is typically paired with a door controller, keypad or card reader on the secure side of the door, with a mechanical override handle or push-bar on the exit side to meet fire egress requirements. The 340g body provides enough holding force for standard residential and light commercial doors without requiring heavy-duty frame reinforcement. The polished stainless steel finish provides corrosion resistance and a clean appearance against both painted and powder-coated door frames. The lock accepts 12VDC input from a dedicated access control power supply or door controller with integrated PSU. The compact 123mm length allows the lock to fit within standard door frame widths without protruding past the frame edge into the door reveal. Specification Materials Aluminium Alloy Mounting Surface Operating Voltage 12V DC Power Consumption 250mA Maximum Holding Force 400KG Dimensions 110 x 50 x 32mm Product Net Weight 0.34KG Product Gross Weight 0.37KG Downloads Product Specification Sheet Product Manual Frequently Asked What does fail-secure mean? Fail-secure means the lock engages and secures the door when power is removed or fails. This is the opposite of fail-safe operation, where the lock releases during a power failure to allow free egress. Fail-secure locks are used where security must be maintained during outages, typically paired with a mechanical override on the exit side to meet fire safety requirements. What voltage does the lock require? The Aperta A1SLS operates on 12VDC. It must be paired with a dedicated access control power supply or a door controller with an integrated 12VDC output. Check the product manual for the exact current draw to ensure your power supply is adequately rated. Is this suitable for outdoor use? The stainless steel finish provides some corrosion resistance, but the lock is designed for internal door frame mounting in controlled environments. For outdoor or weather-exposed applications, verify IP rating and temperature range in the product manual before installation. What tools are needed for installation? Installation requires a drill and appropriate drill bits for the frame material, a screwdriver for the fixing screws, and a low-voltage cable for the 12VDC power connection. The lock body has five fixing holes for screw mounting to the door frame surface.
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