Switched source with forced ventilation - built-in fan, prepared for connection with battery (with safety backup) in grid box with wired connectors. Size: 275 x 50 x 115 [+/- 2 mm]. Input = 176 ÷ 264VAC, Output=27.6VDC@9Amp with 1/2 / 4Amp for battery. Protections: SCP, OLP, OVP, UVP, OHP. Optical LED signaling. For DIN rail mounting, a PSDIN2 bracket is required.