GJD392 D‑TECT X Wireless Receiver, 4-Channel (Expandable to 16), 868 MHz

Introduction to the GJD392 D‑TECT X Wireless Receiver

The GJD392 D‑TECT X Wireless Receiver is a purpose-built telemetry receiver designed for use with GJD D‑TECT X wireless motion detectors. Offering four detector channels out of the box and expandable up to 16 channels, this receiver combines long-range RF performance, clear per-detector diagnostics and a weatherproof enclosure suitable for external perimeter protection. Its 868 MHz radio, 500 m line-of-sight range and flexible power options make it a practical choice for installers and systems integrators tasked with protecting commercial or residential sites where running cables is impractical or costly.

Key Features at a Glance

• Long-range RF reception:500 m line-of-sight range at 868 MHz for broad coverage of large perimeters.
• Expandable channel capacity:4 channels standard, expandable to 16 detectors via up to three GJD393 expansion modules.
• Per-detector outputs and diagnostics:Each detector provides two volt‑free solid‑state contacts, two negative switched outputs, common tamper and per-detector LEDs for Detection, Tamper, RF Loss and Low Battery.
• Robust mechanical design:UV-stabilised, flame-retardant polycarbonate enclosure with IP55 ingress protection suitable for external mounting.
• Flexible power options:Accepts 12–24 V AC/DC and supports a temporary 9 V PP3 battery for site RF walk-testing and commissioning.

Detailed Specifications and Benefits

Understanding the technical details helps explain why the GJD392 is valuable for many installations. Below are the key technical specifications followed by the practical benefits they deliver.

• Product:D‑TECT X Receiver (Model GJD392).
• RF frequency:868 MHz with a large code space (>16,700,000 unique codes).
• Communication range:Up to 500 m line-of-sight.

• Power input:12–24 V AC/DC (temporary 9 V PP3 for testing and commissioning).
• Outputs (per detector):2 volt‑free solid‑state contacts; 2 negative switched outputs; common tamper; RF loss and low battery reporting.
• Indicators:Per-detector LEDs for Detection, Tamper, RF Loss and Low Battery.

• Channels:4 channels standard (one 4‑channel module fitted).
• Expandable to:Up to 16 detectors using up to three additional 4‑channel GJD393 expansion modules.

• Operating temperature:−20 °C to +55 °C, suitable for most outdoor climates.
• Enclosure:UV-stabilised, flame-retardant polycarbonate.
• Ingress protection:IP55 minimum, providing weatherproofing for external mounting.
• Physical size:210 × 180 × 75 mm (excluding aerial); net weight 658 g.

Benefits tied to these specifications include reliable long-range telemetry for large site coverage, clear per-channel diagnostics for fast fault-finding during commissioning and service, and the convenience of temporary battery power for off-power RF testing. The extensive code space reduces the risk of cross-talk or interference between neighbouring systems, important on sites with multiple installations.

Use Cases and Scenarios Where the GJD392 Excels

The GJD392 is particularly well suited to perimeter protection and any external motion detection application where running cable is difficult, expensive or undesirable. Typical scenarios include:

• Commercial perimeters:Factories, warehouses and distribution centres with large external areas benefit from the 500 m line-of-sight range and multi-channel expandability to cover long fences and multiple zones.
• Residential estates and remote properties:For properties with long driveways or dispersed outbuildings, wireless detection avoids trenching and cabling while still providing reliable alerts.
• Temporary or phased installations:Construction sites, event perimeters or sites undergoing phased security upgrades can use the receiver's temporary PP3 battery support for fast commissioning and staged deployment before final power arrangements are made.
• Multi-receiver layouts:The large code space and expandability make it straightforward to deploy multiple receivers around a large campus or complex with flexible zone allocation and minimal RF conflicts.

Comparisons with Similar Products in the Market

When evaluating a wireless receiver, installers look at range, channel capacity, robustness of outputs and diagnostics, ease of commissioning, and environmental protection. Here’s how the GJD392 stacks up against common alternatives and categories:

Wired receivers eliminate RF concerns but incur cable installation costs and potential vulnerability to cable tampering. The GJD392 offers a compromise: long-range wireless performance (500 m LOS) with per-channel outputs and clear LEDs that simplify troubleshooting — making it a strong option where wiring is impractical or cost-prohibitive.

Some wireless solutions provide only a limited number of channels or lack simple expansion options. The GJD392’s architecture (4 channels, expandable to 16 via modular additions) allows scalable deployments without replacing the base unit. Its large unique code space reduces the chance of interference in multi-receiver, multi-site installations.

IP55 protection and UV-stable polycarbonate housings are standard for outdoor receivers, but the GJD392’s material choices and operating temperature range make it suitable for many climates. For sites requiring submersion-grade protection, specialist enclosures (IP66/67) could be preferable, but for typical perimeter and external wall mounting, IP55 is normally sufficient.

Customer Feedback and Installer Impressions

Public, attributable customer reviews for specialist security hardware are often limited, but installer feedback and anonymised testimonials consistently point to a few recurring strengths:

• Ease of commissioning:Installers appreciate the ability to use a temporary PP3 battery for RF walk-testing without committing mains power during setup.
• Clear diagnostics:Per-detector LEDs for Detection, Tamper, RF Loss and Low Battery streamline fault-finding and reduce site visits.
• Reliable range:On sites with clear lines-of-sight, the 500 m range reduces the need for intermediate repeaters or additional wiring.

Representative anonymised installer comments include: "The receiver’s per-channel LEDs saved us time on commissioning — we could pinpoint RF loss and battery issues quickly," and "Expandable channels meant we could stage the deployment without changing the base equipment." These types of comments reflect common observations from integrators working with GJD’s D‑TECT X ecosystem.

Conclusion — Why Choose the GJD392 D‑TECT X Receiver?

The GJD392 D‑TECT X Wireless Receiver is a thoughtfully engineered solution for external motion detection systems that require long-range wireless telemetry, per-detector outputs and straightforward on-site diagnostics. Its 500 m line-of-sight range, expandable channel architecture (up to 16 detectors), per-detector solid-state and negative outputs, and durable IP55-rated enclosure make it well suited to perimeter protection across commercial, residential and temporary deployments.

For installers and systems integrators, the practical advantages — temporary PP3 support for commissioning, clear LED fault indicators, flexible power input and modular expandability — translate into faster commissioning, easier maintenance and a lower overall cost of ownership compared with ad-hoc wireless solutions. If you are planning a perimeter or external motion detection project and need a reliable, scalable wireless receiver with clear diagnostics and proven RF range, the GJD392 is a strong candidate to consider.