Subrack, basic modules disc XI/ON, connection levels: 3 connection levels, connection technology: spring-loaded terminals, for disc module, connection to C-rail, protection class: IP20, can be used for: XN-2DO-24VDC-0.5AP, XN-2DO-24VDC-0.5AN, XN-2DO-24VDC-2A-P, XN-2DO-120/230VAC-0.5A, standards and regulations: EN 61000-6-2, EN 61000-6-4, EN 61131-2