Haydon HAY-PSU24V1ASMSP 24V DC 1A Boxed Power Supply with Fire Alarm Input Relay
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-PSU24V1ASMSP 24V DC 1A Boxed Power Supply with Fire Alarm Input Relay
The Haydon HAY-PSU24V1ASMSP is a high-quality 24V DC boxed switch-mode power supply engineered to provide dependable power for access control systems, magnetic door retainers, emergency door release systems and other professional security applications. Designed for continuous operation, the unit delivers a stable 24V DC regulated output with the output limited to ±10% to ensure reliable voltage stability for connected equipment.
Powered from a 170–264V AC mains supply, the PSU delivers up to 1A of regulated DC output (24W), making it suitable for a wide range of security and life safety equipment requiring a consistent 24V DC supply. High-efficiency switch-mode electronics help reduce running costs while maintaining lower operating temperatures for improved long-term reliability.
A key feature of the HAY-PSU24V1ASMSP is its integrated fire alarm input relay, allowing seamless integration with fire alarm systems. The relay includes selectable Normally Open (NO) or Normally Closed (NC) operation together with an external 24V DC relay input, making the unit particularly suitable for magnetic door holders and emergency door release applications where power must be interrupted during a fire alarm event.
KEY FEATURES
- Regulated 24V DC output
- Maximum output current of 1A
- 24W maximum output power
- High-efficiency switch-mode power supply
- Output stability limited to ±10%
- Fire alarm input relay
- Selectable NO/NC relay input
- External 24V DC relay input
- Electronic short-circuit protection
- Electronic overload protection
- Lid tamper detection
- Green mains LED indicator
- Red fault LED indicator
- Durable steel enclosure
- Wall-mounted installation
- Ideal for access control and magnetic door retainers
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