Ajax Rex 2 Range Extender with Photo Verification Support
- CCTV Lens Guide
- Hard Drive Size Guide
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, frame rate settings, and whether you have H.265 encoding enabled or not to save space (We advise turning it on to double the capacity shown below with ease).
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 (to perhaps double or more these figures again).
|
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 2 Terabytes for a 4 x 4/5MP HD camera setup, as this should give you approx 2 weeks using H.265 @ 20fps and that is on continuous, not motion-detected recording.
(You may only require the full 25 frames per second on certain cameras if things are fast-moving - ie above a till)
You can also use the Hikvision online calculator to work out what works best for you specifically: https://tools.hikvision.com/ca...
(All of our hard drives come fitted and are CCTV-specific from one of the major brands)
More applications of a security system
Range extenders expand the boundaries of the protected area and give even more freedom to place security system devices. By connecting all or part of the devices 1 to ReX 2, you will ensure the security and automation of a business centre, estate, warehouse complex, or a large production facility.
5 range extenders can operate within the Ajax system to expand the coverage of the radio network up to 35 km2 2. Events and alarms are transmitted instantly, and the first photo verification snapshot is delivered to a monitoring station and users in just 13 seconds 3.Tech specs
| General settings | |
| Classification | Radio signal range extender |
| Colour | White, black |
| Installation method | Indoors |
| Limitations | |
| Compatibility with hubs | Hub 2, Hub 2 Plus |
| Number of ReX 2 connected to the hub |
|
| Number of devices connected to ReX 2 | Depends on the hub model:
|
| Communication | |
| Communication protocols | Encrypted two-way radio protocols:
|
| Radio communication range |
Up to 1,700 m without obstacles |
| Radio frequency band | 866.0 – 866.5 MHz 868.0 – 868.6 MHz 868.7 – 869.2 MHz 905.0 – 926.5 MHz 915.85 – 926.5 MHz 921.0 – 922.0 MHz Depends on the region of sale. |
| Radio signal modulation | GFSK |
| Maximum effective radiated power (ERP) | ≤ 20 mW |
| Polling interval | 12–300 s (set by administrator in the app) |
| Delivery speed of alarms from the detector to the hub via a range extender | 0.3 s |
| Delivery speed of photos from the detector to the hub via a range extender |
18 seconds (depending on settings) |
| Power supply | |
| Power supply source | 110–240 V AC, 50/60 Hz |
| Backup battery | Li-Ion 2 Ah (up to 38 hours of battery life) |
| Anti-sabotage protection | |
| Tamper | + |
| Radio frequency hopping | + |
| Fraud protection | + |
| Lid | |
| Operating temperature range | From −10°C to +40°C |
| Operating humidity | Up to 75% |
| Dimensions | 163 × 163 × 36 mm |
| Weight | 410 g |
| Service life | 10 years |
