Roger Technology R21/351SUB 230v Electric Replacement Motor
- 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)
Electric Gate Automation Motor
The R21/351SUB 230v from Roger Technology is an electromechanical underground irreversible motor ideal for swing gates up to 3.5m & comes with 2m of cable.
Electric Motor Features
Single motor for replacement, R21/351SUB
230V Self Locking Motor
Manual Override in case of power failure
Internal stops in open and close
Opening up to 180 degrees (Optional)
Dieffematic CROMO gate motor/Also known as GIBIDI K21, GIBIDI R21/35 R21-35
The Roger Technology R21 underground electric gate motor uses steel gears for strength and long-lasting use. As opposed to alloy gears used in other well-known motors such as the CAME Frog (see picture on the right).
The R21 230v can be used to directly replace an existing V2 Vulcan but also is a direct replacement for the CAME Frog-A motor. Fits into the CAME Frog and Came FROG A foundation box. Maximum opening angle 110°.
This replacement motor comes with the top link, stop, a new capacitor and cable as per picture, enabling the cable to be connected unbroken directly to the connection box. Joining the cable inside the foundation box is the single most failure area where moisture enters the motor over time.
A mains filter should be fitted on the supply to the control panel.
It reduces mains interference and prolongs the life of the PCB.
If you have wooden gates then we strongly recommend the use of our adjustable bracket set as these commercial grade motors come with standard weld-on brackets.
No posts found
