SITOP UPS500S Maintenance-free uninterruptible power supply with USB interface Basic unit 5 kWs Input: DC 24 V Output: DC 24 V/15 A Protection class IP20 SITOP UPS500S with absolutely maintenance-free capacitors is the ideal addition to all 24 V power supplies. They bridge short-term power outages up to a few minutes. This time is usually enough to safely shut down PC-based automation systems or to visualize and archive operating data in the event of longer power outages. The USB interface and a free software tool enable easy communication with the PC. The capacitors have a very long service life even at high temperatures and can be used at ambient temperatures of up to 60 °C. There is no need to maintain or replace the energy storage device, which means that the DC UPS pays for itself after a short time. And because the capacitors do not emit any gas, there is no need to ventilate the control cabinet. Short charging times quickly restore buffer readiness after a power failure. The UPS500S for DIN rail mounting can be extended with SITOP PSU501S expansion modules (maximum 3) to extend the buffer time.