Ruijie Reyee RG-NIS-PA240-54 Industrial 54V 240W DIN Rail Power Supply Module
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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Ruijie Reyee RG-NIS-PA240-54 Industrial 54V 240W DIN Rail Power Supply Module
The RG-NIS-PA240-54 is a professional industrial power module designed to provide reliable and stable power for Ruijie industrial networking equipment, especially RG-NIS series switches and PoE systems. It supports a wide AC input range of 100–240V (90–264V max), making it suitable for unstable or varying electrical environments commonly found in industrial installations. The unit delivers a regulated 54V DC output at up to 4.4A (240W total power), ensuring sufficient and stable power for PoE switches and connected devices. Built for demanding environments, this power supply supports DIN rail mounting, allowing easy installation inside control cabinets and structured network enclosures. It is designed for high efficiency, low maintenance and long operational life, with robust protection against electrical faults. The device includes multiple safety protections such as overload protection, short-circuit protection, and over-voltage protection, ensuring safe operation of connected networking equipment. Its fanless design helps maintain silent operation and improves long-term reliability by reducing mechanical wear.
KEY FEATURES
- Industrial DIN rail AC-to-DC power supply
- Stable 54V DC output for PoE networking equipment
- 240W total power output
- Wide AC input range 100–240V (90–264V max)
- Designed for Ruijie industrial switches (RG-NIS series)
- Overload protection
- Short-circuit protection
- Over-voltage protection
- Fanless silent operation
- High reliability for continuous 24/7 operation
- DIN rail mounting for industrial cabinets
- Suitable for CCTV, factory, transport and industrial networks
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