Introduction to Ajax DoorProtect Fibra and its key features
Ajax DoorProtect Fibra — wired magnetic opening detector for doors & windows.Designed for professional intrusion systems, the DoorProtect Fibra (model family 44393.03.WH1) brings the reliability of a hardwired contact combined with advanced Fibra two‑way communication. It detects door and window opening via reed switches, reports tamper events, and offers a dedicated NC input for integrating a third‑party wired sensor. Remote monitoring and configuration are available through Ajax mobile apps and PRO tools, making it an installer‑friendly option for residential and commercial projects.
Key features at a glance:
- Wired Fibra communication:secure, two‑way protocol over a 4‑core bus suitable for long runs.
- Dual reed switches:allows flexible magnet placement (left or right); two magnets included (large and small).
- NC input for external sensors:integrates a third‑party detector with its own power source.
- Tamper reporting and authentication:notifies on case removal and prevents spoofing.
- Low power consumption:efficient quiescent and max current values for large systems.
- Chime capability:can trigger siren chimes and act as a doorbell when the system is disarmed.
Detailed specifications and the benefits they deliver
The technical specifications of the DoorProtect Fibra translate directly into installer and end‑user benefits. Below are the key specs and what they mean in practice.
- Model family:DoorProtect Fibra (44393.03.WH1) — part of Ajax’s wired Fibra lineup designed for integration with Fibra hubs.
- Communication:Fibra wired protocol over a 4‑core bus — delivers secure two‑way communication, remote diagnostics, and fast event reporting across the system.
- Line length (max):up to 2,000 m using U/UTP Cat.5 — supports long cable runs for larger buildings and perimeter installations without repeaters in many cases.
- Sensing element:2 × reed switches — two switches provide installation flexibility (magnet can be placed on either side), and redundant detection improves reliability.
- Additional input:NC terminal for third‑party sensor (external power required) — allows integration of glassbreak, tilt, or other wired detectors into the same contact housing.
- Nominal power / operating voltage:24 V⎓ (operating 5–30 V⎓) — wide voltage range gives compatibility with different power supplies and generous tolerance for voltage drop on long runs.
- Power consumption:quiescent ≈ 0.044 mA, max ≈ 1.42 mA — extremely low idle draw helps keep the entire alarm bus efficient and limits power budget impact.
- Dimensions & weight:90.5 × 21 × 18.5 mm; ≈ 54 g — compact size for discreet mounting around doors and windows.
- IP rating:IP50 — designed for indoor use and dry environments typical of doors and window frames.
- Operating environment:−10 °C to +40 °C, up to 75% non‑condensing humidity — suitable for most residential and commercial interiors.
- Durability:up to ~2,000,000 open/close cycles — robust mechanical life for long‑term perimeter protection.
- Tamper:case removal tamper reporting — protects against sabotage and provides event logging for maintenance or forensic needs.
- Colours & warranty:White (also available in black), 24‑month warranty — choice of finish to match décor and a standard 2‑year guarantee.
Benefits summary: the DoorProtect Fibra’s wired architecture removes concerns about battery life and RF interference, while Fibra’s two‑way protocol ensures reliable communications and remote management. The dual‑reed design and NC input make the device adaptable to varied installation requirements, and the long line length capability supports larger building topologies.
Use cases and scenarios where DoorProtect Fibra excels
The DoorProtect Fibra is engineered for professional installations where reliability, scalability, and integration are priorities. Typical use cases include:
- Residential perimeter security:front doors, back doors, garage access, and sliding patio doors where a dependable wired contact is preferred over wireless due to signal obstacles or long service life requirements.
- Commercial properties:office suites, retail storefronts, server rooms and storage areas where wired detection is often specified by security policies or building codes.
- Large installations and campuses:organizations that need long cable runs (up to 2,000 m) and centralized power management benefit from Fibra’s wired bus architecture.
- Integrated third‑party sensors:sites that require an additional detector (e.g., magnetic tilt on gates, shock sensors) to be read into the same device via the NC input.
- High‑security and monitored premises:facilities that require tamper reporting, device authentication and reliable two‑way communication to a control hub or monitoring station.
- Installer‑centric workflows:professional alarm integrators who need remote testing, diagnostics, and configuration through Ajax PRO tools can speed up commissioning and maintenance.
Its chime capability also makes DoorProtect Fibra useful in customer‑facing scenarios: when the alarm system is disarmed, a door opening can trigger a siren chime to welcome visitors or signal staff, functioning like a wired doorbell in retail or reception areas.
Comparison with similar products on the market
When evaluating DoorProtect Fibra against alternatives, consider three broad categories: wired reed contacts, wireless contact sensors, and combined sensors with additional detection modes.
- Wired reed contacts (standard):Basic wired contacts are widely used and inexpensive. DoorProtect Fibra elevates the standard contact by offering Fibra two‑way communication, tamper detection, and a high‑quality materials/finish with a lifecycle rated to ~2,000,000 cycles. Compared with bare contacts, DoorProtect Fibra provides advanced integration and remote monitoring features.
- Wireless magnetic sensors:Wireless contacts offer flexible placement and no trenching/cabling but rely on batteries and RF. In environments with RF congestion, structural RF attenuation, or where battery replacement logistics are problematic, the wired DoorProtect Fibra is a more reliable long‑term solution. Wireless is often better for retrofits where running cable is impractical.
- Multi‑sensor door/window devices:Some products combine reed contacts with tilt, shock or accelerometer detection to guard against forced entry or glass break. DoorProtect Fibra focuses on the core contact function and robustness, plus an NC input for third‑party sensors, making it a modular choice: integrate a dedicated shock or glassbreak sensor when needed rather than using a combined—but sometimes more expensive—single device.
In short, DoorProtect Fibra sits between the simplicity of classic wired contacts and the flexibility of wireless sensors, offering professional features (remote management, tamper, authentication, long runs) that large or mission‑critical systems demand.
Customer testimonials and installer feedback
While specific customer reviews vary by region and installer, common feedback themes from professional integrators include:
- "The two‑reed design makes positioning the magnet easy during installation, saving time on tight frames." — professional installer feedback.
- "Using Cat.5 for long runs simplified wiring and kept the installation tidy. Fibra's diagnostics helped find a loose connection quickly." — systems integrator comment.
- "The tamper reporting and authentication added confidence for our monitored commercial accounts; it integrates cleanly into existing Ajax hubs." — security company note.
End‑users typically value the reliability of a wired contact and the convenience of chime functionality when the system is disarmed. Installers appreciate the low power draw on the bus and the wide operating voltage range, which reduces issues with voltage drop on long cable runs.
Conclusion: Why DoorProtect Fibra is a strong choice
For projects that require a dependable, professionally managed contact sensor, the Ajax DoorProtect Fibra delivers a compelling balance of durability, flexibility and integration features. Its wired Fibra two‑way communication ensures fast, secure reporting and remote management; dual reed switches and included magnets simplify mounting; the NC input allows third‑party sensor integration; and the capacity for long cable runs with Cat.5 makes it suitable for large installations.
Compared to wireless options, DoorProtect Fibra eliminates battery maintenance and is less susceptible to RF problems. Compared to basic wired contacts, it adds tamper detection, authentication, and system diagnostics that matter for monitored and high‑security sites. With a compact form factor, low power consumption, and a 24‑month warranty, it is well suited for both residential and commercial deployments where reliability and professional features are priority considerations.
Suggested price:24.00 (manufacturer suggested). Warranty: 24 months. For installers and security managers designing wired Ajax Fibra systems, DoorProtect Fibra is a practical and future‑proofed choice for door and window protection.
