The GPIB Option (PSU-GPIB), the isolated voltage option (PSU-ISO-V) and the isolated current option (PSU-ISO-I) all use the same option slot, meaning that only one of the three options can be used at any one time.

To use GPIB, the optional GPIB option (PSU-GPIB) must be installed. This is a factory installed option and cannot be installed by the end-user. Only one GPIB address can be used at a time.