Haydon HAY-PSU12V1ABB 12V DC 1A Boxed Switch Mode Power Supply with 13.8V Battery Backup for Security Systems
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
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Haydon HAY-PSU12V1ABB 12V DC 1A Boxed Switch Mode Power Supply with 13.8V Battery Backup for Security Systems
The Haydon HAY-PSU12V1ABB is a high-efficiency 12V DC boxed power supply with battery backup designed for professional security installations where reliable continuous power is essential. Suitable for intruder alarm systems, access control equipment, door controllers and other low-voltage security devices, the unit combines regulated DC output with intelligent battery charging in a compact, installer-friendly enclosure.
Powered from a universal 90–264V AC mains input, the PSU delivers a regulated 13.8V DC nominal output during normal operation with a maximum continuous load current of 1A. During a mains power failure, the unit automatically switches to the connected standby battery, supplying approximately 10.0–12.3V DC to maintain operation of connected equipment without interruption. It supports a 12V 7Ah sealed lead-acid battery and provides a dedicated 0.5A charging circuit to maintain the battery in optimum condition. Battery not included.
Designed for dependable long-term operation, the HAY-PSU12V1ABB incorporates electronic overload and short-circuit protection, automatically shutting down the output during fault conditions under mains operation to protect both the PSU and connected devices. Integrated mains transient protection helps reduce the impact of electrical surges and voltage spikes, improving overall system reliability.
KEY FEATURES
- Regulated 12V DC switch mode power supply
- 13.8V nominal output during mains operation
- Maximum continuous output current of 1A
- Universal 90–264V AC input
- Integrated battery backup charging circuit
- Supports one 12V 7Ah sealed lead-acid battery
- Maximum 0.5A battery charging current
- Automatic changeover during mains failure
- Electronic overload protection
- Electronic short-circuit protection
- Mains transient protection
- Lid and rear anti-vandal tamper detection
- Green mains present LED
- Red fault LED indicator
- Hinged steel enclosure
- Installer-safe fully shrouded high-voltage electronics
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