The Schneider Electric XPSUAF13AP is a compact electronic safety module from the XPS series of safety controllers. Specifically, it is an expansion module or accessory unit designed to add extra safety inputs and/or outputs to a primary XPS safety controller. It enables the extension of safety functions (such as emergency stop, safety gate monitoring, or two-hand control) in machine safety systems, helping to achieve compliance with safety standards like ISO 13849 and IEC 62061.