Siemens 6ES5951-7ND41 Simatic S5 PLC Module System

Siemens 6ES5951-7ND41 is a SIMATIC S5 PS 951 power supply module designed for use with the S5-115U/H/F controllers. It accepts a DC 24 V input and provides a regulated 5 V DC rail to the S5 system, delivering 7 A of 5 V DC without a fan subassembly or up to 15 A with a fan subassembly, enabling reliable operation of the CPU, memory, and I/O circuits in industrial environments. The module is galvanically isolated from the line side, aligning with Siemens safety standards for control cabinets. It is specified for use without a backup battery (no Pufferbatterie) as part of the PS 951 power supply family, a common choice for powering SIMATIC S5 racks in legacy automation installations. Designed for S5-115U/H/F systems, this 6ES5951-7ND41 provides a compact, single-module solution to refresh older S5 power rails without modifying the surrounding hardware, making it a straightforward upgrade path for older equipment that requires a stable 5 V supply in demanding industrial settings.