Siemens 6ES7505-0KA00-0AB0 SIMATIC S7-1500 System Power Supply PS 25W 24V DC PLC Power Supply

The Siemens 6ES7505-0KA00-0AB0 is a SIMATIC S7-1500 system power supply that feeds 25 W into the backplane bus from a 24 V DC input (19.2 to 28.8 V), drawing 1.3 A rated current with 20 ms mains buffering. It includes reverse-polarity and short-circuit protection and dissipates 6.2 W at nominal load.

Technical Specifications

Selection Notes

The 25 W infeed budget is sized for the backplane bus and connected module electronics, not for powering field loads directly, so the configured rack's total module current draw needs to stay inside that 25 W ceiling per TIA Portal's power calculation; step up to a higher-wattage supply in the family once that budget is exceeded. The wider -25 to 60 degC horizontal rating versus -25 to 40 degC vertical is a factor when choosing panel orientation for hot cabinets.

Applications

Feeding the S7-1500 backplane bus (CPU plus connected I/O modules) in a standard control cabinet, including installations up to 5,000 m altitude or 60 degC ambient in horizontal mounting.