This document is an operating instruction manual for Siemens AG Österreich's SITOP smart series products. These products include models such as SITOP smart 2.5A, SITOP smart 5A, SITOP smart 10A, etc. Operating these electrical devices requires adherence to safety precautions to prevent electric shock injuries and property damage.
This manual contains important safety information for the SITOP Smart 24 V power supplies. Only qualified personnel may work on the equipment, the main switch must be turned off and locked out before any installation or maintenance, and a protective device (fuse) and disconnecting device must be provided. The units must be mounted vertically with a minimum 50 mm clearance above and below, and the input and output terminals must face downward.
The document also lists the electrical characteristics of the supplies: input voltage 120/230 V AC, input voltage range 85‑132 V / 170‑264 V AC, frequency 47‑63 Hz, output voltage 24 V DC, ripple <150/240 mV, efficiency up to 91 % at full load, protection class I, IP 20, operating temperature 0 °C‑+60 °C and storage temperature –40 °C‑+85 °C. Parallel operation of two identical units is allowed under specific conditions.
| Input nominal voltage | 120/230 V AC |
|---|---|
| Input voltage range | 85‑132 V / 170‑264 V AC |
| Input frequency range | 47‑63 Hz |
| Output nominal voltage | 24 V DC |
| Output ripple / spikes | < 150/240 mV |
| Protection class | I |
| IP rating | IP 20 |
| Operating temperature range | 0 °C … +60 °C |
| Storage temperature range | -40 °C … +85 °C |
The main switch must be turned off and locked out, only qualified personnel may work on the equipment, and a protective device (fuse) and a disconnecting device must be provided.
The device must be installed vertically with the input and output terminals at the bottom and a minimum free space of 50 mm above and below the unit.
Yes, two identical units may be paralleled provided the output voltage difference is less than 0.2 % and the line impedances to the load are equal.
The supplies accept a nominal input voltage of 120/230 V AC, with an allowable range of 85‑132 V or 170‑264 V AC.