Electric strike, hold-open (memory) & mechanical unlocking, S12UPW, HARTTE, BIRA

Electric strike with memory function and mechanical unlocking, S12UPW, HARTTE, BIRA

The HARTTE S12UPW is an NC (fail-locked) electric strike designed for doors and gates where both electric and mechanical unlocking options are required. Belonging to the HARTTE S series, it combines standard installation dimensions with a strong mechanical structure, 3500 N break-in resistance and a 4 mm latch adjustment. The strike features two additional functions: a memory (P) function and mechanical unlocking (W), making it a versatile solution for demanding access control installations.

Main features

Technical characteristics

The S12UPW is an NC strike, which remains locked without power. An electrical impulse temporarily releases the latch, and the memory (P) function keeps the strike unlocked until the door or gate is physically opened for the first time. This allows multiple passages without the need to send repeated unlock commands. The robust internal mechanism offers up to 200,000 operating cycles, while the 3500 N break-in resistance ensures a high level of physical security.

Installation and compatibility

With its standard dimensions of 20.5 × 75 × 28.5 mm, the S12UPW can be easily fitted into most common door frame profiles. The symmetric body allows installation on both DIN left and DIN right doors, and the strike can be mounted in either vertical or horizontal orientation. The 4 mm latch adjustment enables precise alignment between the strike and the lock latch, helping to achieve smooth closing and reliable operation.

Key benefits

The HARTTE S12UPW offers a combination of electronic and mechanical features in one compact housing. The memory (P) function keeps the door unlocked after an impulse until the first opening, which is ideal for short-term free passage. The mechanical unlocking (W) function provides an additional level of control, allowing the strike to be unblocked by a lever so that it does not lock when the door or gate is closed. This is particularly useful when doors temporarily need to operate as free-passage doors without changing the wiring or controller settings.

• NC (fail-locked) operation – remains locked without power.
• Memory (P) function – keeps the strike unlocked after an impulse until the door is opened.
• Mechanical unlocking (W) – lever used to unblock the strike so it does not relock when closing the door or gate.
• 3500 N break-in resistance for enhanced security.
• 4 mm latch adjustment for precise alignment.
• Standard dimensions and symmetric design for easy retrofit.

Applications

• Access control systems requiring NC locking.
• Doors and gates that need a strike with memory function.
• Sites where mechanical backup unlocking is required.
• Commercial, administrative and public buildings.
• Aluminum and metal door frame installations.

Technical specifications

FAQ (Frequently Asked Questions)

Is the HARTTE S12UPW a normally open (NO) strike?

No. The S12UPW is an NC (fail-locked) strike, which remains locked without power and unlocks only after receiving an electrical impulse or by using mechanical unlocking.

What does the memory (P) function mean?

The memory function keeps the strike unlocked after a short electrical impulse until the door or gate is physically opened. This is useful when several people need to pass through without sending multiple unlock commands.

How does mechanical unlocking (W) work?

Mechanical unlocking (W) means that the strike is equipped with a lever that can be used to unblock it so that it does not relock when the door or gate is closed. In this mode, the door remains freely passable until the lever is returned to its normal position.

How strong is the S12UPW in terms of security?

The S12UPW offers up to 3500 N break-in resistance, making it suitable for installations where a higher level of mechanical strength is required.

Is the strike compatible with DIN left and DIN right doors?

Yes. Thanks to its symmetric body, the strike can be installed on both DIN left and DIN right doors, in vertical or horizontal mounting positions.