Introduction to the Haydon HAY-ACCESS12V5A-4W and its key features
Haydon HAY-ACCESS12V5A-4W — Boxed 12 V DC 5 A Access Control PSU (Battery Backup)is a compact, installer-focused power solution designed specifically for small-to-medium access control systems. Built in a metal enclosure that can accommodate up to two Paxton NET2 controller boards, this unit delivers a regulated 12 V DC main output (5 A / 60 W total) with supervised battery backup, a 4-way fused fire interface, tamper detection and multiple protection features. It strikes a balance between practical features, safety and cost-effectiveness — making it a popular choice for contractors and security installers who need a ready-to-mount, compliant power supply for access control projects.
Detailed description of specifications and benefits
The HAY-ACCESS12V5A-4W is specified to cover the typical needs of door controllers, electric locks, readers and auxiliary devices while providing safety and supervision features that are important in commercial and public-sector installations.
- Input voltage:100–240 V AC, 50/60 Hz — suitable for international and UK mains supplies.
- Main DC output:Regulated 12 V DC; on mains this typically sits around 13.2–13.8 V DC to allow for battery float charging and reliable device operation.
- Output current (total):5 A (60 W) max — sized for small-to-medium installations and common access control loads.
- Battery output range:Approximately 10.0–13.2 V DC when running from the standby battery, ensuring continued operation during mains failure.
- Charger current:Approximately 0.8 A max (model dependent) for supervised battery charging.
- Output fusing:Main output fused (typ. F5A) plus four fused switched fire outputs (approx. 1.5 A each).
- Battery capacity supported:Space for one 12 V standby battery up to 7 Ah — an industry-standard size that balances run-time and enclosure footprint.
- Battery supervision:Monitored charging and battery fault reporting — helps ensure batteries are available when needed and alerts technicians to degraded batteries.
- Enclosure:Metal boxed enclosure designed to mount up to two Paxton NET2 controller boards — neat, secure and installer-friendly.
- Approx. dimensions:W 365 × H 330 × D 85 mm (vendor reported) — compact enough for cabinet or wall mounting in plant rooms or risers.
- Tamper detection:Front and rear tamper switches to detect enclosure opening or removal.
- Panel indicators:LEDs for Mains, Battery, Door Open and Fault provide clear, at-a-glance status for service personnel.
- Fire interface:Four fused, switchable outputs configurable as N/C, N/O or ±5–24 V DC to integrate with fire panels and emergency release circuits.
- Protections:Built-in protections for over-current, overload, over-charge and over-discharge to protect connected electronics and the battery.
- Compatibility:Designed to house Paxton NET2 2-board controllers and is compatible with many reader and lock types used in access control systems.
- Typical pack includes metal enclosure with internal mounting standoffs, fused output board, supplied fuses, PG11 gland, rubber grommets, M4 metal and adhesive standoffs and mounting screws (contents may vary by supplier).
- Installer-fit product — mounting and wiring should be performed by a qualified installer. Always consult the official Haydon datasheet for wiring diagrams, fuse values and compliance (CE / UKCA) before installation.
Benefits — what this PSU delivers in real-world terms
- Reliable, regulated power:The regulated 12 V DC output keeps readers, controllers and locks operating within specification, reducing intermittent faults tied to voltage droop or noise.
- Battery-backed continuity:The built-in battery space with supervised charging maintains operation during mains outages and provides monitored health reporting, which is crucial for high-availability doors.
- Installer-friendly integration:A boxed metal enclosure that accepts Paxton NET2 boards, pre-fused outputs and clear status LEDs reduce on-site wiring time and post-install troubleshooting.
- Fire and safety integration:Four configurable, fused fire outputs allow straightforward integration with building fire systems for emergency egress or interface with fire panels without complex external switching.
- Protection and peace of mind:Over-current, over-charge and battery protection features help protect investments in locks, readers and controllers.
Use cases and scenarios where the Haydon PSU excels
The HAY-ACCESS12V5A-4W is engineered to suit a defined set of applications where a compact, supervised and boxed PSU is preferred over loose or unboxed alternatives.
- Ideal for offices, clinics, retail stores and small corporate sites where one or two controller boards and several readers/locks require a supervised 12 V supply.
- Designed to house up to two NET2 controller boards, making it a convenient option for projects that specify Paxton equipment or similar two-board controllers.
- The boxed form factor with tamper detection and included mounting hardware simplifies retrofits into existing risers or cupboards, especially where a neat, lockable enclosure is required.
- The 4-way configurable fire outputs are well suited to buildings requiring supervised emergency release circuits tied into a fire panel, enabling safe egress and compliant behaviour during alarm conditions.
Comparisons with similar products in the market
When choosing an access control PSU, installers typically compare boxed units like the Haydon HAY-ACCESS12V5A-4W against three common alternatives: unboxed bench-style power supplies, higher-capacity multi-output PSUs, and dedicated OEM PSUs bundled with a single controller brand. Here is how the Haydon compares.
- Unboxed supplies are often cheaper but lack tamper detection, battery housing, neat enclosure and pre-fused, fire‑interface outputs. Haydon’s boxed approach improves security and reduces installation time at a modest premium.
- Higher-capacity PSUs offer more current and multiple regulated rails for larger installations, but they are typically bigger, more expensive and may be overkill for small-to-medium sites. The Haydon unit targets a sweet spot for typical NET2 deployments where 5 A is sufficient.
- Some controller manufacturers offer bespoke PSUs tightly integrated with their controllers. Those can be convenient but limit flexibility. The Haydon enclosure is manufacturer-agnostic enough to mount Paxton NET2 while still supporting generic readers and locks.
- With a suggested retail price around 119 (typical supplier pricing may vary), the Haydon PSU positions itself as an affordable boxed solution offering battery backup, fire outputs and tamper detection — features that would add cost if sourced separately.
Customer feedback and typical reviews
While formal published reviews for every hardware SKU can be limited, feedback from installers and resellers for products in this class commonly emphasises the following themes. The examples below are representative of installer commentary for units with similar functionality:
- Quick to install:"Mounting the NET2 boards and wiring the outputs was straightforward — the pre-fused outputs saved time and the LEDs make initial commissioning quick."
- Good value:"For the price, the unit packs useful features you normally add separately— battery space, tamper and fire outputs."
- Reliable backup:"Battery supervision gives confidence that the system will stay up during outages and flags battery faults so we can plan maintenance."
- Room for improvement:"For larger installations you may need higher current capacity, but for small sites this is a sensible boxed option."
These typical comments align with the product positioning: an economical, installer-friendly PSU for common access control projects rather than a high-end, high-current central power system.
Conclusion: Why the Haydon HAY-ACCESS12V5A-4W is a great choice
The Haydon HAY-ACCESS12V5A-4W boxed 12 V DC 5 A access control PSU delivers a balanced mix of features that matter in everyday installations: regulated and supervised power, battery backup, configurable fire-interface outputs, tamper detection and a compact metal enclosure that accepts popular controller boards such as Paxton NET2. It is especially well suited to small-to-medium access control projects where reliability, safety compliance and straightforward installation reduce time on site and ongoing maintenance costs.
For installers seeking a cost-effective boxed PSU that adds meaningful supervision and safety features over bare power supplies, the Haydon unit represents strong value. Always check the official Haydon datasheet for wiring diagrams, fuse ratings and compliance details before installation, and have a qualified installer perform wiring and mounting.
Quick specification snapshot:12 V DC regulated output, 5 A total (60 W), supports 1 × 12 V up to 7 Ah battery, 4-way fused fire outputs, front & rear tamper, LEDs for Mains/Battery/Door/Fault, and built-in protection features. Typical warranty ~2 years (confirm with supplier).
Whether you are specifying equipment for a small office, a school extension or a retail fit-out, the HAY-ACCESS12V5A-4W gives you a compact, supervised and secure power solution that simplifies installation and supports reliable access control operation.
