The MOIA Model 6654/281DFB/S2 multi-system is an advanced lock for security doors that combines security and versatility. Thanks to its double locking mechanism, with a geared upper lock, it provides high protection against break-in attempts, and the presence of the double burglar trap ensures immediate locking in case of forced entry, increasing the overall strength of the door. The double bottom latch lends solidity to the master lock, while the intelligent design allows it to meet articulated and hierarchical security needs: the MOIA multi-system adapts with agility to complex installations, and which require a higher level of security.
When is a multi-system lock useful?
Multi-system locks offer flexible access management, proving particularly useful in a variety of everyday situations.
- Domestic helpers: a key can be provided to service staff to open the secondary lock, without the need to share the main key compromising the privacy and security of the home.
- Temporary leases or transfers: in the case of short leases or transient rentals, only the service key can be handed over to tenants, which will allow access to the home or office, while still maintaining a high standard of security at the end of the guests’ stay, thanks to the master lock.
- Shared offices: in professional environments where several people use the same space, a multi-system lock allows access to offices or archives to be managed according to authorization levels, offering the ability to determine if and when authorized personnel can access certain areas that are under the control of the higher hierarchical level.
- Vacation rentals: owners can provide guests with a key that allows access to common areas of the house, keeping private rooms or personal storage rooms closed. The ideal solution for those who rent on Airbnb, Booking, etc.!
- Maintenance and services: when it is necessary to allow access to technicians or maintenance personnel, a multi-system lock allows a key to be provided that restricts access to only those areas needed for service while protecting the rest of the home or building.
In addition, in condominium settings, multi-system locks can be used to manage access to common areas, such as meeting rooms or storage rooms, ensuring that only authorized residents can access them, and only at times when the person in charge of common areas grants access by opening the master lock.
This versatility in access management makes multi-system locks an ideal choice for those who want hierarchical and customized security control in various settings, both residential and commercial.

Three locking configurations for customized control
MOIA’s multi-system locks are distinguished by the presence of two locking mechanisms, which can be configured in three different modes:
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Independents
Both mechanisms can be operated separately, offering maximum freedom of use. However, this mode may pose a risk of not locking fully due to negligence.
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Captive employees (D5)
It provides the highest level of security as it forces the user to close both mechanisms following a predetermined sequence.
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Released employees (D6)
It represents a middle ground between the previous two, allowing freedom when locking, but imposing a precise sequence when opening.

Strengths of multi-system lock 6654/281DFB/S2
This lock is distinguished by a number of advanced features that enhance its security and ease of installation:
- Double burglar trap: a high-security system that locks the lock in case of break-in or burglary attempts when the lock is fully closed.
- Top gear mechanism: designed for smoother and quieter locking.
- “All-inclusive” attachments: compatibility with double-diameter planar fasteners, cage nuts, and front thread for threaded plate.
- Reversible low latch: adaptable for both left- and right-handed installations, simply turn the latch to change the direction of the lock.
- Steel latches: four main latches plus two additional ones for reinforced protection.
- Anti-tube cylinder protection: both European cylinders must be protected with an anti-tube cylinder protection that can be installed on M6 int. 38 mm holes.
- Smart-ready: locks can be made smart by installing motorized cylinders, enabling access management even remotely, via keypads or electronic devices such as smartphones.
- Hierarchical access management: with the appropriate encryption, both locks can be opened with the master key, while the service key will work only with the secondary lock: ideal for guests, technicians, or service personnel.
- Tested for more than 100,000 cycles-a guarantee of longevity and reliability.
Why choose a MOIA multi-system
MOIA developed the 6654/281DFB/S2 lock with a focus on strength and security, ensuring a product that can meet the toughest challenges. Robust construction and high-quality materials ensure not only effective protection against break-in attempts, but also a long service life, tested for more than 100,000 cycles of use.
What sets this lock apart is its ability to adapt to the user’s needs, combining technology and practicality. The provision for motorized cylinders makes it compatible with the latest smart solutions, while the hierarchical access management system offers unprecedented control over the security of one’s home or business.
Ultimately, the MOIA 6654/281DFB/S2 multi-system lock is not just a locking element, but a true investment in security and everyday peace of mind. With its advanced features and customization options, it is the ideal choice for those seeking a reliable, innovative product designed to last.