Cameras inside a −25 °C freezer room, switches outside it

The need

The operator had cameras only at loading docks because the previous installer put a switch inside a freezer room; condensation killed it within a season. Cameras inside the rooms were needed for pallet and door monitoring, and the corridor outside ran at 5-10 °C with high humidity. Any cabinet electronics had to survive that, and the freezer side had to work without a switch.

What was specified

Why that split

The industrial PoE unit sits where the humidity swing is survivable, and only the cable crosses into the freezer. That removes the failure mode that killed the previous installation: a switch whose internals condense every time the door opens. The wide-temperature switch handles the control room, which is cold but not freezing. Converters cover the docks where no cabinet exists at all.

Result

• Cameras now cover the freezer rooms, with no electronics inside them.
• Cabinets are in positions maintenance can reach without a freezer suit.
• Camera drops inside the rooms became a cabling task, not a hardware task, when the layout changed.

Client and site are anonymised. The configuration is a reference design, not a quotation; temperature class, cable specification and defrost cycles must be checked on site.