See: The 2512-A is a 120240VAC Power Supply designed for CTI 2500 SeriesTM and SIMATIC 505 PLCs. The triple-wide module provides up to 75 watts at 5VDC for use by the PLC CPU and IO modules. When operated in a dual configuration in a 2500-R11-A base, it provides support for power supply redundancy. Features - CTI 2500 SeriesTM SIMATIC 505 base format - 90-264VAC, 47-63 Hz single phase input power - Up to 75 watts 5VDC to PLC CPU and IO modules - Works in CTI 2500-R11-A and Siemens 505-6511 redundant bases The 2512-A Power Supply can be installed in single configurations in standard bases (2500-R4, 2500-R8, 2500-R16-A). For redundancy, 2512-A must be installed in a dual configuration in a 2500-R11-A or 505-6511 base.