The Behlman BL1500 unit is powered from 115 VAC, 47-63 Hz and provides two ranges of high-voltage AC at 60 Hz. Units can be stacked for increased power. Protective circuits include input, short circuit, constant current and thermal protection. BL1500 power supplies have an RS 485 interface, allowing the unit to be controlled and monitored remotely from a central station. It operates from 32 to 131 degrees F (0 to 55 degrees C), and has a high-strength 19-inch rack mount chassis 3.5” high x 21.5” deep (48.25 cm wide x 7.87 cm high x 54.61 deep).