Subrack, basic modules disc XI/ON, connection levels: 3 connection levels, connection technology: spring-loaded terminals, for disc module, basic module for feeding in the field supply, basic module for the gateway supply (with XN-BR-24VDC-D), protection class: IP20, can be used for: XN-BR-24VDC-D, XN-PF-24VDC-D, XN-PF-120/230VAC-D, standards and regulations: EN 61000-6-2, EN 61000-6-4, EN 61131-2