Keithley 360w and 720w programmable dc power supplies keithley 2260b 80 27 the keithley 2260b 80 27 is a single output variable programmable bench dc power supply rated at 720w from the 2260 series the power supply can source a wide range of voltages and currents with the 360w output providing constant power for a flexible range of voltage and current output combinationsthe wide range of output voltages and currents of the 2260 80 27 along with multiple interfaces enable its use in numerou