---
title: "Function of MASTER card added to the package of PRxx2 series controllers - Roger"
description: "Roger - lider branży zabezpieczeń oferujący systemy kontroli dostępu, rejestracji czasu pracy, rejestracji pracy wartowników. Zapraszamy!"
url: "https://www.roger.pl/en/support/technical-support/faq-frequently-asked-questions/faq-access-control/racs-4-system/access-controllers/function-of-master-card-added-to-the-package-of-prxx2-series-controllers"
date: "2026-06-27T13:50:02+00:00"
language: "en-GB"
---

#  Function of MASTER card added to the package of PRxx2 series controllers

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**Description:**
**What is the function of MASTER card which is added to PRxx2 series controllers (PR302, PR402, PR602LCD)?**

**Solution:**

MASTER card, which is added to PRxx2 series controllers is by default programmed as MASTER user. It is a diagnostic card which allows to perform simple test if the device is working correctly. It also allows to make full device RESET procedure including ID address programming (if the controller has numeric keypad).

Warning: MASTER card with PRxx2 series controllers is not a programming card. Programming must be carried out through communication interface from RACS software.

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