Gw instek psw80 40 5 1080w programmable switching dc power supply gw instek psw80 40 5 p the gw instek psw80 40 5 is a single output multi range programmable switching dc power supply covering a power range up to 1080w the multi range feature allows the flexible and efficient configuration of voltage and current within the rated power range as the gw instek psw80 40 5 can be connected in series for maximum 2 units or in parallel for maximum 3 units the capability of connecting multiple ps