> For the complete documentation index, see [llms.txt](https://docs.spiroq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.spiroq.com/en/guides/navody/payments/terminal-mdb.md).

# Card terminal

This guide is for a terminal connected by cable to the MDB payment board (the same path as the coin changer). A **SumUp Solo** terminal on Wi-Fi is a different path — [SumUp Solo](/en/guides/navody/payments/sumup-solo.md).

## Connection

Connect the terminal with a cable to the MDB payment board. Usually it is enough to plug in the cable and run the test below — the ports should already be set from the installation wizard.

In Service menu → **Payments**, check that **MDB** is selected, not **Cloud API**.

## Test

1. Open the [service menu](/en/guides/navody/everyday-operation/servisni-menu.md) → **Payments**.
2. Device detection starts automatically. **Cashless / card** should show as active.
3. On the customer screen (the sales grid), add a product to the cart, choose card payment, and finish the purchase on the terminal.
4. The goods must come out, and the sale appears in the Hub in the machine detail on the **Sales** tab.

The payment port should be configured from the [first-run wizard](/en/guides/navody/getting-started-and-installation/pruvodce.md) at the **Serial ports** step. If the terminal still shows as inactive in Service menu → **Payments**, check the payment port in Service menu → Device settings → **Machine type**, **Ports** tab. Then check detection again.

On spiral machines, Service menu → **Payments** also has **Reset MDB bus** — use it when the terminal stops answering, and then repeat detection.

A partial dispense (part of the cart did not come out) on an MDB terminal does not reliably charge a reduced amount on every reader. In that case the customer on the machine gets a choice of a compensation voucher or a refund request. More detail in [Refunds and a voucher](/en/guides/navody/troubleshooting/vraceni-penez.md).