Ajax DoorProtect Plus Fibra Wired Door/Window Detector with Shock & Tilt, 24 V, 90.5×21×18.5 mm, DOORPROTECT-PLUS-FIBRA

Introduction to the Ajax DoorProtect Plus Fibra and its key features

The Ajax DoorProtect Plus Fibra is a professional-grade wired magnetic door/window detector that combines opening, shock and tilt detection into a single compact device. Designed for indoor use as part of Ajaxs Fibra wired security ecosystem, the DoorProtect Plus Fibra brings encrypted two-way communication, extended line reach and flexible mounting options to commercial and residential installations. With a 24 V nominal input, support for up to 2,000 m of Cat.5 cabling to the hub, adjustable sensitivity settings and terminals for a third-party normally-closed (NC) detector, this detector is built for installers and end-users who need reliable, tamper-resistant perimeter protection.

Detailed description of specifications and benefits

The DoorProtect Plus Fibra packs multiple sensor types and practical installation features into a compact 90.5 × 21 × 18.5 mm enclosure. Below is a breakdown of the most important specifications and the benefits they deliver in real-world deployments.

• Device type:Wired magnetic door/window detector with shock and tilt sensors (2 × reed for opening detection).
• Connectivity:Fibra wired two-way encrypted protocol, connects to Ajax Hub Hybrid (Fibra) via a 4-core cable; line reach up to 2,000 m over U/UTP Cat.5.
• Power:Nominal 24 V DC (operating range 5–30 V DC); low quiescent current (~0.043 mA) and max nominal current around ~1.55 mA.
• Sensors:Two reed switches for opening (left/right magnet placement), 1 accelerometer for shock detection (3 sensitivity levels), adjustable tilt detection (threshold 5°–25°).
• Extras:Terminals for one third-party NC detector (external detector not powered), tamper alerts, chime support when paired with an Ajax siren.
• Mechanical & environmental:Dimensions 90.5 × 21 × 18.5 mm, weight ≈54 g, protection class IP50, operating temperature range −10°C to +40°C, humidity up to 75%.

• Combined sensing for fewer false alarms:By pairing two magnetic reeds with accelerometer-based shock detection and tilt sensing, the DoorProtect Plus Fibra can distinguish between genuine forced-entry attempts (shock + opening) and routine door movement, reducing nuisance alarms while maintaining high detection reliability.
• Flexible sensitivity and configuration:Shock sensitivity has three levels and tilt can be set between 5 and 25. Installers can also choose to ignore single shocks — a useful option where incidental knocks are common.
• Long wired reach and robust communication:Fibras two-way encrypted protocol and up to 2,000 m Cat.5 line reach make this device ideal for larger properties and multi-building sites where wireless devices may struggle or require repeaters.
• Integration and backup inputs:A normally-closed external input provides a path to connect an additional third-party detector, giving installers flexibility when integrating with legacy sensors or specialized detectors.
• Installer-friendly hardware:Supplied with large and small magnets (different operating gaps) and mounting kit to suit various door and window frames, plus support for left/right magnet placement simplifies fitment in constrained spaces.

Use cases and scenarios where the DoorProtect Plus Fibra excels

The DoorProtect Plus Fibra is engineered for professional installations where dependability, integration and precise detection are priorities. Typical scenarios include:

• In storefronts or service entrances where forced entry can involve prying or impact, the combination of shock and tilt detection helps detect break-ins earlier than a reed alone.
• Long cable runs to a central control room are easily handled by the 2,000 m Cat.5 reach, allowing perimeter sensors to be connected without complex repeaters or multiple hubs.

• For centralized security panels, wired Fibra devices simplify management and maintenance while ensuring encrypted, authenticated communication — important where multiple stakeholders share a building.
• Chime support can act as a benign audible notice for deliveries or restricted door openings during business hours (when paired with an Ajax siren).

• Homeowners who prefer wired systems for reliability (no batteries, less wireless interference) will benefit from the combined sensors to detect forced entry attempts on doors and windows more effectively.
• The tilt function is useful for detecting attempts to remove a window or spoil a fitted grille by lifting it out of its frame.

• The external NC input lets installers bridge old wired detectors into a modern Fibra network, providing an incremental upgrade path without replacing every sensor immediately.

Comparisons with similar products in the market

When choosing a perimeter detector, buyers typically compare wired vs wireless designs, single-sensor vs multi-sensor devices, and platform compatibility. Here's how the DoorProtect Plus Fibra stacks up conceptually:

• Reliability:Wired Fibra devices like the DoorProtect Plus Fibra offer consistent connectivity and are not subject to RF interference or battery depletion risks inherent to some wireless systems.
• Distance and topology:With up to 2,000 m reach over Cat.5, this detector supports sprawling properties and runs between buildings that would challenge wireless radio ranges.
• Installation complexity:Wired devices require cable runs and are best fitted by professionals, while wireless units can be quicker for DIY installs; DoorProtect Plus Fibra is aimed at professional installation environments.

• Single reed contacts are simple and inexpensive but can be fooled by techniques that bypass the reed (e.g., wedging a door open after tampering). The inclusion of shock and tilt sensors provides layered detection to cover more attack vectors.
• For critical locations where forced entry attempts may involve prying or impact (retail back doors, server room access), a multi-modal sensor yields faster, more reliable alarms.

• Compared to generic wired magnetic sensors, an Ajax Fibra device provides encrypted device authentication, integrated alerting to Ajax apps and PRO tools, and convenient remote configuration, making it a better fit where secure, managed monitoring is required.

Customer testimonials and installer feedback

While individual experiences vary by installation environment and integrator, feedback from professional installers and end-users who deploy Ajax Fibra devices tends to highlight a few consistent strengths:

• Reliability:Installers report stable, predictable communication over long cable runs and fewer service calls compared to isolated wireless nodes in difficult RF environments.
• Installation flexibility:The availability of two magnet sizes and left/right placement options often gets positive mentions for simplifying fitment on narrow frames and recessed doors.
• Reduced false alarms:Integrators note that combining opening, shock and tilt data reduces false positives in busy locations where single-sensor reeds might trigger unnecessarily.
• Professional toolset:Security companies appreciate the ability to remotely configure sensitivity and chime options through Ajax apps and PRO tools, streamlining commissioning and aftercare.

If you are buying through an accredited Ajax partner, ask for references or case studies from similar installations to see how the DoorProtect Plus Fibra performs in environments like yours.

Conclusion: Why the Ajax DoorProtect Plus Fibra is a great choice

The Ajax DoorProtect Plus Fibra is a strong option for anyone specifying wired perimeter protection that needs more than a simple reed contact. It combines magnetic opening detection with accelerometer-based shock sensing and configurable tilt monitoring to deliver multi-layered coverage against forced entry methods. Fibras encrypted two-way communication and long Cat.5 line reach suit larger or distributed sites where wireless solutions may be unreliable. Installer-focused features  such as multiple magnets, configurable sensitivity, and an external NC input  make it flexible for retrofit and new-build projects alike.

For security professionals and property owners who require robust, manageable and tamper-aware perimeter sensors, the DoorProtect Plus Fibra delivers the essentials: reliability, configurability and integration into the wider Ajax platform. As always, work with accredited partners to ensure correct wiring, placement and commissioning so you get the full benefit of the devices capabilities and maintain compliance with local safety and installation standards.