The PPU-500 from Space Electric Thruster Systems (SETS) is a Power Processing Unit for Thruster with Mass 4.3 Kg, Supply Voltage 22 to 36 V, Anode Power Supply 200 to 500 W, Anode Voltage 230 V, Cathode Power Supply 50 to 90 W. More details for PPU-500 can be seen below.