UPS battery system controller for DIN TS-35/7.5 or 15 rail embedding, with single outputa and UL508 certified. 24 VDC output voltage with 4, 7 and 12Ah options. With power LED indicator. Cooling by free air convection. Perfect as a 24VDC system backup, up to 40A. Parallel connection to DC BUS. Battery polarity protection.