Systems for adjusting power outputs of isolated electronic devices are described. A first connector including an external power pin and a field power pin connects an electronic device to a power supply. The first connector receives a first current level from the power supply at the external power pin, and a second current level from the power supply at the field power pin. A jumper block is configurable in a first position which electrically isolates the external power pin from the field power pin, and a second position which electrically couples the external power pin to the field power pin. The first position directs the first current level from the external power pin to a second connector, and the second position directs a combination of the first current level and the second current level from the external power pin and the field power pin to the second connector.