Block PVSE Series DIN Rail Power Supply Range - Block PVSE 400/24-20, The Block PVSE 400/24-20 is a DIN Rail 3-Phase Primary Switched Mode Power Supply from Block's Economy PowerVision PVSB 400 series. With large power reserves focussing on the key task of power supply. Block PVSE 400/24-20 PowerVision DIN Rail Power Supply 24VDC 20A 480W 3-Phase