Dahua PFM791 - HD Video Ground Loop Isolator for HDCVI Systems
Product Features
- Dahua PFM791 is an HD video isolator that works as a ground loop isolator for HDCVI video.
- It solves the HDCVI image interference caused by ground loops.
- Use it indoors or in a junction box.
- Isolation voltage is 800V minimum, with a 42 x 22.5 x 16 mm body and a 400mm length.
Dahua PFM791
The Dahua PFM791 is an HD video isolator, in practice a video ground loop isolator for HDCVI systems. Dahua designed it to solve the HDCVI image interference caused by ground loops, and it can be used indoors or in a junction box.
Key features
- HD video isolator that solves HDCVI image interference caused by ground loops.
- For indoor use or use in a junction box.
- Isolation voltage of 800V minimum and insertion loss of 0.5dB.
- Working temperature from -20 to +55 C.
Technical specification
| Model | PFM791 |
|---|---|
| Insertion loss | 0.5dB |
| Frequency response | 0-65MHz |
| Input impedance | 75 ohm |
| Output impedance | 75 ohm |
| Isolation voltage | 800V minimum |
| Isolation resistance | 100M ohm |
| ESD protection, contact discharge | 600V (IEC61000-4-2) |
| ESD protection, air discharge | 8000V (IEC61000-4-2) |
| Surge protection | 4KV 10/700us (IEC61000-4-5) |
| MTBF | Over 20000h |
| Body dimensions | 42 x 22.5 x 16 mm (1.65 x 0.89 x 0.63 in) |
| Length | 400mm (15.75 in) |
| Outer shell | ABS |
| Colour | Black |
| Net weight | 38g (0.08lb) |
| Working temperature | -20 to +55 C (-4 to +131 F) |
| Relative humidity | 0 to 95% |
Package information (as listed by Dahua)
- HD Video Isolator PFM791 x 1
Common questions
What does the Dahua PFM791 do?
It is an HD video isolator that solves the image interference that ground loops cause on HDCVI video.
Which video system is it for?
HDCVI. See Dahua HDCVI cameras explained for how HDCVI works.
Where can I install it?
Dahua says it can be applied indoors or in a junction box. The working temperature range is -20 to +55 C.
What isolation does it give?
Dahua lists an isolation voltage of 800V minimum and an isolation resistance of 100M ohm.
How big is it?
Dahua lists a body of 42 x 22.5 x 16 mm and a length of 400mm.
For HDCVI over Cat5e/Cat6 cable on the same job, see the Dahua DH-PFM800-4K passive video balun pair.
Full manufacturer specification: Dahua product page
Browse the full Dahua range or contact us on 01902 902251.
Supplied by Zenith Security Co, Wolverhampton. We deliver to England, Scotland and Wales, or you can collect from our Wolverhampton trade counter (please call first).
| Product Code | PFM791 |
|---|---|
| Brand | Dahua |
| Product Type | Accessories & Mounts |
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