This is a male card-edge connector PCB designed to plug into a female 500-series style card-edge socket (often found in audio gear). It’s essentially a bare adaptor: a board that turns an insert-card interface into a male edge plug that mates with the standard female 500-series edge connector. A general wiring and connection checklist PDF for many 500 series applications can be downloaded here.

What it does

Provides the physical and electrical interface from a printed circuit to the standard female 500-series card-edge connector.
Lets you mount a board or module (your own or custom) and then insert it into an existing rack or carrier that uses the 500-series standard.
The female connector shown on the product page is only for illustration — this product is just the male edge connector PCB.
Simply put: your board → this edge-connector PCB → plug-into 500-series rack.

How it works / what to check

You’ll need to make sure your board aligns with the pin-out of the 500-series edge standard (power rails, audio inputs/outputs, common grounds, etc.).
Mechanical fit: the “male” card edge needs to match the female socket’s width, board thickness, pad layout, etc.
While this doesn’t include the female socket or any mounting hardware, it gives you the crucial edge plug part.
Because it’s just a connector board, look at the quality of the board material, edge finish, pad design so that insertion/removal is reliable and you avoid mechanical stress.

Why someone might use it

If you’re building a custom module for a 500-series rack and need the compatible edge interface without buying a full module housing.
If you’re adapting an existing non-500 board into a 500-series environment and need the interface board.
If you want to experiment or prototype within the 500-series ecosystem and need a simple, reusable edge connector.

Things to consider

The PCB is only one part of the assembly: you’ll still need to handle mechanical mounting, rack housing, power supply compatibility, etc.
Edge-connectors wear over time; durability depends on insertion cycles and quality of the socket and board.
Thermal, noise and signal-integrity concerns still apply when doing audio / high-performance analogue work — the connector is just one link in the chain.
Check the pin-out alignment carefully so no mis-wiring happens when you plug into a 500-series carrier.