The PAM Series power supplies offer a factory-option twisted-pair TP-BUS digital communication function. The power supplies can be configured for a power supply system of up to 434 channels in combination with power supply controllers in the Kikusui PIA-4800 Series. The TP-BUS allows a single power supply controller (such as the Kikusui PIA-4830) to control up to 31 PAM Series power supplies. It also allows a control signal cable to be laid over a distance of 200 meters. For those who require GPIB, it can be installed as a factory option.