Siemens 6ES7505-0RB00-0AB0 SIMATIC S7-1500 PS 60W 24/48/60V DC HF PLC Power Supply

The Siemens 6ES7505-0RB00-0AB0 is a SIMATIC S7-1500 system power supply rated 60 W that feeds the backplane bus from 24 V, 48 V, or 60 V DC input and buffers CPU RAM retentively during a supply interruption. It accepts 19.2-72 V DC with reverse-polarity and short-circuit protection and provides a 20 ms mains-buffering hold time.

Technical Specifications

Selection Notes

The HF (High Feature) designation marks the buffer-capable power supply variant: it retains S7-1500 CPU RAM data retentively through a supply interruption, unlike a basic PS without buffer functionality. The tri-voltage 24/48/60 V DC rated input covers three common DC bus voltages from one part number, so it fits panels standardized on 48 V or 60 V DC distribution without a separate PS model. Reserve this unit for racks where retentive data protection during dips matters; a standard non-HF PS is adequate where that buffering is not required.

Applications

Fits S7-1500 backplane feeds in control cabinets running 24 V, 48 V, or 60 V DC distribution, and in installations where a brief supply dip must not corrupt CPU retentive memory - such as machines on generator or battery-backed DC buses with momentary voltage sag.