Introduction to the Pyronix Deltabell Plus External Sounder Module
The Pyronix FPDELTAP2MOD Deltabell Plus External Sounder Module is a compact, high-output alarm module designed for Grade 2 wired intruder alarm systems. Sold as the module only, it forms part of the Deltabell Plus family and delivers a powerful 104 dB(A) piezo sounder combined with a front LED/backlight and a strobe for visual deterrence. With an integrated NiMH backup battery, multiple tamper protections and a weatherproof polycarbonate housing, this module is built to offer dependable exterior alarm signalling for domestic and light-commercial installations.
Key features at a glance
- 104 dB(A) piezo sounder— loud, attention-grabbing audible alarm.
- Strobe and LED— 10 ms pulse at 1 Hz for visual deterrence even when sounder is cut off.
- NiMH backup battery— 7.2 V, 250 mAh with a typical service life of 2–5 years.
- Tamper protection— lid, base and power tamper with engineer hold-off/cut-off functionality.
- Universal triggering inputs— compatible with most control panels for retrofit flexibility.
- Weatherproof housing— Environmental Class IV polycarbonate enclosure suitable for exposed locations.
- Self-levelling mounting— built-in spirit level simplifies installation and alignment.
Detailed specifications and benefits
Understanding the specific technical details helps explain why the Deltabell Plus module is a practical choice for many alarm installations. Below are the main specifications and the benefits they bring in real-world use:
- Loudness:104 dB(A) — This level is loud enough to attract attention across a residential or small commercial property, act as an effective deterrent and provide clear audible notification to neighbours or passers-by.
- Sounder type:Single piezo (Plus model) — Piezo sounders are compact, reliable and produce a sharp, penetrating tone well suited to outdoor alarm signalling.
- Strobe:10 ms pulse at 1 Hz — The bright strobe provides a visual alert and helps locate the alarm source in conditions where the sound may be harder to interpret, such as noisy streets or when the sound is intentionally suppressed.
- Cut-off timer:Sound stops after 15 minutes while strobe continues — This provides a balance between effective deterrence and reducing nuisance from prolonged full-volume alarms. The strobe continuing preserves visible indication that an alarm event occurred.
- Battery:NiMH 7.2 V, 250 mAh — Provides reliable backup in case of mains failure with a typical service life of 2–5 years depending on environment and cycling.
- Operating voltage:9–16 V DC (datasheet lists 11.8–16 V in some tables) — A wide input range helps compatibility with various control panels and supply arrangements.
- Alarm and quiescent current:Alarm current typically ≤300 mA; quiescent typically <60 mA — Predictable current draw aids system design and ensures the battery and supply can support the device during alarm conditions.
- Tamper protection:Lid, base and power tamper with engineer hold-off — Protects the device against interference or removal and allows engineers to temporarily hold off alarms during service.
- Environmental class:Class IV polycarbonate housing — Weatherproof design suitable for exposed outdoor mounting, helping ensure long-term reliability in varying climates.
- Dimensions:290 × 285 × 50 mm — A low-profile module that is large enough to be visible yet compact for discreet mounting.
- Warranty:2 years manufacturer warranty — Standard manufacturer support which provides buyer confidence and basic coverage against defects.
Use cases and scenarios where the Deltabell Plus excels
The FPDELTAP2MOD is designed to fit into a variety of common alarm scenarios. Typical applications include:
For homeowners replacing ageing external sirens or fitting a new wired alarm, the Deltabell Plus module offers a straightforward solution. Its universal triggering inputs and wide operating voltage range make it compatible with many popular control panels. The built-in strobe and loud 104 dB output provide a clear deterrent to intruders while alerting neighbours to an incident.
Small shops, offices, workshops and other light-commercial sites often need a reliable external alarm that offers both audio and visual signalling without the footprint or cost of larger sounder units. The Deltabell Plus meets this need with weatherproof construction and tamper protection suitable for typical exterior mounting points.
Because the Deltabell Plus is a module intended for use with the wider Deltabell family, it is useful when business or residential sites require a modular approach: adding a high-performance sounder module to an existing housing, or replacing a single component without reworking a whole enclosure. The self-levelling mounting further simplifies accurate installation on uneven surfaces.
Comparisons with similar products in the market
When selecting an external sounder, installers and end-users typically consider loudness, durability, power options, tamper protection and compatibility. Compared to other Grade 2 external sounders in its class, the Deltabell Plus stands out in several ways:
- Loudness:At 104 dB(A), it matches or exceeds many compact piezo sounders aimed at domestic and light-commercial use. Some competing units offer similar SPL but may lack the combined LED/backlight and timed strobe behaviour found here.
- Battery backup:The built-in NiMH battery provides local failover without needing additional external battery packs. Larger high-power sounders may use lead-acid backup or require separate battery compartments, making the Deltabell Plus an easier fit for compact installs.
- Tamper and engineer features:The inclusion of lid, base and power tamper with an engineer hold-off/cut-off function offers practical on-site serviceability; cheaper alternatives sometimes omit engineer hold-off or provide only basic tamper detection.
- Weatherproofing:Environmental Class IV polycarbonate is comparable to many market leaders aimed at external use. Higher-grade or heavy industrial products might offer greater ingress protection (e.g. IP66/67) but at increased cost and size.
Overall, the Deltabell Plus is competitive for users who need a balance of performance, compactness and cost for Grade 2 installations. For sites that require ultra-high output, extended backup times or specialized housings, larger external sounders or full integrated units should be considered.
Customer testimonials and reviews
While this article does not rely on named endorsements, typical installer and end-user feedback on modules like the Deltabell Plus centres on a few recurring positives:
- Reliable deterrence:Installers report that the 104 dB tone combined with the strobe effectively deters opportunistic intruders and draws quick attention.
- Easy to install:The self-levelling feature and universal inputs reduce installation time, particularly when retrofitting to existing systems.
- Good value:At a suggested retail price of 34.99 (cost price 26.18), many installers find the module offers a strong price-to-performance ratio for Grade 2 applications.
Example summary comments often seen in trade forums and installer notes include: "Compact and loud enough for most residential sites," "Battery backup is handy for nuisance power cuts," and "Engineer hold-off saves time during maintenance." These are representative of common installer sentiment rather than direct quoted reviews.
Conclusion: why choose the Pyronix Deltabell Plus module?
The Pyronix FPDELTAP2MOD Deltabell Plus module is a well-balanced external sounder option for domestic and light-commercial Grade 2 alarm systems. It combines a high-output 104 dB piezo sounder, an effective strobe and LED visual indicators with practical installation features like self-levelling mounting and universal trigger inputs. Built-in NiMH backup, multiple tamper protections and a weatherproof polycarbonate housing make it dependable in everyday external environments. With a two-year manufacturer warranty and a competitive suggested retail price, the Deltabell Plus is an attractive choice for installers and end-users seeking a compact, capable and cost-effective external alarm module.
For safe and compliant installation, always engage a competent engineer or qualified installer, consult the official installation manual (provided with the product) and verify compatibility with your control panel and local regulations before fitting.
