The IEEE-488 Compatible Interface, -05 Option for the Fiuke 4200 Series Programmable Voltage Sources, provides voltage source remote control capability via any standard IEEE-488 bus. The 4200-05 option comprises a single printed circuit board assembly which mounts within the voltage source case through an opening provided in the rear panel. Device address selection for the voltage source containing the IEEE-488 Compatible Interface is provided by switches mounted on the rear panel of the assembly. The switches are accessible with the assembly installed in the voltage source. Connection of the IEEE-488 Compatible Interface to the IEEE-488 bus is made by means of a standard IEEE-488 compatible connector mounted on the rear panel.