Dahua PFM791 - HDCVI Video Isolation Transformer
Product Features
- Video isolation transformer with telemetry pass-through for HDCVI
- Corrects image interference caused by ground loops
- Suits indoor use or inside a junction box
Dahua PFM791 — HDCVI Video Isolation Transformer
The PFM791 is a video isolation transformer for HDCVI systems, correcting image interference caused by ground loops while passing telemetry signals through. It's compact enough for indoor use or fitting inside a junction box.
Who is it for?
Sites experiencing HDCVI image interference (hum bars, banding, rolling lines) caused by a ground loop between the camera and recorder — typically where the camera and recorder are earthed at different points with a voltage difference between them.
Key specification
| Function | Video isolation with telemetry pass-through |
|---|---|
| Compatible With | HDCVI systems |
| Fixes | Ground-loop-caused image interference |
| Installation | Indoor, or inside a junction box |
| Certifications | CE, FCC |
| Weight | 50g net |
What you will need
- An HDCVI camera and recorder experiencing ground-loop interference
- A junction box if installing outdoors or in an exposed run
Frequently asked questions
What problem does this solve?
Image interference (rolling bars, hum) on an HDCVI feed caused by a ground loop between camera and recorder.
Does it affect PTZ/telemetry control?
No — telemetry signals pass through the isolator.
Can it be installed outdoors?
It's designed for indoor use or inside a junction box, not direct outdoor exposure.
Browse the full Dahua range, contact us on 01902 902251, or visit our Wolverhampton trade counter.
| Product Code | PFM791 |
|---|---|
| Manufacturer | Dahua |
| Colour | Brown |
TECHNICAL SUPPORT
We provide tailored support for you and your CCTV system.
3 YEAR WARRANTY
Many of our Cameras and Recorders come with a comprehensive 3 year warranty.
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FREE DELIVERY OVER £ 149.99
As cheap as £10, orders placed before 2:30pm are dispatched for delivery within 1–2 working days!
