Haydon HAY-FIRE-ISO Single Channel Short Circuit Isolator Module for Fire Alarm 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-FIRE-ISO Single Channel Short Circuit Isolator Module for Fire Alarm Systems
The Haydon HAY-FIRE-ISO is a professional short circuit isolator module developed to protect fire detection and alarm systems against wiring faults that could otherwise disable an entire detection circuit. By automatically isolating sections affected by a short circuit, the module ensures that the remainder of the system continues to operate, helping maintain fire protection throughout the building.
Designed for use within conventional fire alarm installations, the HAY-FIRE-ISO continuously monitors the circuit for abnormal conditions. If a short circuit is detected, the module immediately disconnects the faulty section while allowing devices on the unaffected part of the circuit to remain operational. Once the fault has been cleared, the isolator automatically reconnects the circuit without requiring manual intervention, helping to minimise system downtime.
KEY FEATURES
- Single-channel short circuit isolator module
- Automatically isolates wiring short circuits
- Protects conventional fire alarm circuits
- Maintains operation of unaffected devices
- Automatic reconnection after fault clearance
- Improves system reliability and continuity
- Compact design for discreet installation
- Suitable for new installations and retrofits
- Simple wiring for straightforward installation
- Designed for professional fire detection systems
- Ideal for commercial, industrial and public buildings
- Robust and reliable operation
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