Product DescriptionThe Rosslare MD-D02B 2-Reader Expansion Board is a plug-in module that expands the capacity of Rosslare’s AC-225x-B control panels by adding two additional reader ports, four supervised inputs and four relay outputs. The unit supports Wiegand or Clock and Data format keypads or biometric readers, features LED status feedback for power and relay activation, and is configured through Rosslare’s AxTraxNG software. With a compact 100 × 75.9 × 32.5 mm footprint and minimal power draw, it installs quickly and enables reliable residential or commercial access control expansion.