Introduction: GJD393 D‑TECT X4 4‑Way Receiver Expansion Module
The GJD393 D‑TECT X4 is a plug‑in receiver expansion module designed to extend the capacity of GJD's D‑TECT X wireless receiver family (for example, the GJD392). Installed inside the D‑TECT X receiver enclosure, each module adds four wireless detector channels. By fitting multiple D‑TECT X4 modules a single receiver can be expanded from its base four channels up to a maximum of 16 channels. Compact, CE marked and backed by a typical 2‑year limited warranty, the GJD393 is an ideal accessory for installers and system designers who need a scalable way to grow wireless detection systems without adding separate receivers.
Key features at a glance
- Adds 4 detector channels— each module increases receiver capacity by four wireless detector channels.
- Expandable— fit multiple modules to support up to 16 channels per receiver.
- Plug‑in design— slides into the receiver enclosure slot and connects via the receiver ribbon/expansion connector.
- Compatibility— designed for the GJD D‑TECT X receiver family (e.g., GJD392).
- Compliance & warranty— CE marked with a typical 2‑year limited warranty.
Detailed specifications and benefits
The GJD393 is purposefully simple in concept but valuable in practice. As an accessory module, it carries the following characteristics and benefits:
- Model / Name:GJD393 — D‑TECT X4.
- Function:4‑way receiver expansion module that adds four wireless detector channels to a D‑TECT X receiver.
- Maximum channels:Expand a D‑TECT X receiver to support up to 16 wireless detectors when multiple modules are fitted.
- Compatibility:Specifically designed for the GJD D‑TECT X receiver family (for example the GJD392).
- Mounting / connector:Slides into the next available slot inside the D‑TECT X receiver enclosure and connects via the receiver ribbon/expansion connector.
- Intended use:Accessory only — not a standalone detector. Installation must be performed by a qualified installer following the manufacturer’s instructions.
- Compliance:CE marked. Users should check local regulations for any UKCA requirements where applicable.
- Warranty:Typical limited 2‑year warranty as listed by manufacturers or resellers.
Some technical fields commonly requested by installers (dimensions, weight, operating temperature, power requirements and EAN/barcode) are not provided in the basic module summary. For precise mechanical drawing, connector pinout and electrical characteristics, consult the official GJD D‑TECT X product documentation or request the GJD393 datasheet from your supplier.
Benefits in practice
- Cost‑effective expansion:Adding a module is typically cheaper, faster and neater than installing an additional receiver when you only need a few more channels.
- Space saving:The plug‑in modules use the existing receiver enclosure, reducing the need for extra wall or cabinet space.
- Scalability:Phased projects benefit because you can expand capacity as required — useful for growing sites where full channel count is not needed immediately.
- System simplicity:Keeping detectors on a single receiver simplifies programming, monitoring, wiring and ongoing maintenance.
Use cases and scenarios where the GJD393 excels
The GJD393 shines in a range of commercial and residential projects where modular expansion, minimal disruption and tidy installations matter:
Large sites with multiple access points such as warehouses, factories or campuses often deploy perimeter detectors in stages. Instead of deploying additional receivers as coverage grows, fitting a D‑TECT X4 module into an existing receiver provides an immediate capacity boost and reduces the need for separate control cabinets.
When budgets or site access limit how much can be installed at once, installers can deploy a core system and expand later. The plug‑in expansion approach keeps initial cost and complexity down while allowing a seamless increase in channels without re‑engineering the control setup.
Security integrators combining wireless detectors with CCTV or alarm panels benefit from consolidating detector channels onto fewer receivers — simpler signal mapping, centralised alerts and fewer physical receivers to power and maintain.
Existing sites that already use a D‑TECT X receiver can be upgraded with more detector channels without replacing the receiver or running additional cabling — a particularly attractive option in retrofits where access is constrained.
Comparisons with similar products
When considering the GJD393 against other expansion strategies, a few distinctions become clear:
- Multiple modules vs extra receivers:Adding D‑TECT X4 modules is generally more space‑ and cost‑efficient than installing additional receivers. Extra receivers require their own enclosures, power and potentially separate mounting, whereas modules reuse the existing receiver unit.
- Wireless expansion vs wired detectors:Wireless detectors paired with the D‑TECT X4 avoid running long detector cables back to the panel, reducing labour and material costs. However, where wired sensors are already present and preferred for reliability, a wired approach still has merit.
- Compared to competitor modular systems:Many competitor systems offer expansion via daughterboards or additional receivers. The advantages of the GJD393 lie in its tailored compatibility with D‑TECT X receivers and the convenience of plug‑in installation. The choice between brands often comes down to existing ecosystem, installer familiarity and specific site requirements.
- Limitations to note:The GJD393 is not a standalone detector — it must be used within a compatible receiver. Important installation and electrical parameters are found in the receiver and module datasheets, and sites with extreme environmental requirements should confirm operating specifications before selecting this module.
Customer feedback and installer observations
While there are no individual named testimonials provided here, typical installer and integrator feedback for this type of expansion module highlights a few recurring positives:
- "Modular and tidy" — installers value that extra channels can be added without additional enclosures or major rewiring.
- "Time saving on retrofits" — contractors report quicker upgrades because the module simply slides into the receiver slot and connects via the ribbon connector.
- "Reduced system complexity" — integrators appreciate keeping more detectors on a single receiver for simpler monitoring and fewer devices to maintain.
Potential areas cited for attention include always following the manufacturer’s installation guidance, confirming compatibility with specific receiver firmware versions, and checking the datasheet for any environmental or power constraints not listed on the basic product summary.
Conclusion: Why the GJD393 is a great choice
The GJD393 D‑TECT X4 expansion module is a practical, cost‑effective accessory for anyone using the GJD D‑TECT X receiver family. It offers a straightforward way to increase detector capacity in 4‑channel increments, maximising flexibility while minimising additional hardware and installation complexity. For installers managing phased rollouts, retrofits or sites where enclosure space is a premium, the plug‑in design reduces labour and keeps installations neat.
Backed by CE compliance and a typical 2‑year limited warranty, and sold at a suggested retail price in the region of £139 (price may vary by reseller), the GJD393 represents a sensible investment when you need extra wireless channels without the overhead of additional receivers. For complete technical details such as dimensions, operating temperature and power requirements, request the official GJD D‑TECT X documentation or the GJD393 datasheet before ordering and installation.
In short, if you already use the GJD D‑TECT X platform and foresee the need to scale detector capacity over time, the GJD393 D‑TECT X4 module delivers an efficient, installer‑friendly way to expand — keeping systems consolidated, flexible and easy to manage.
