Wiring adapter for connecting a remotely operable switching device to a control bus

A field replaceable wiring adapter for interfacing a remotely operable switching device to a control device. The wiring adapter contains a set of terminals coupled to control wires extending from the switching device, a conversion circuit, and a second set of terminals coupled to the control device. The conversion circuitry converts a bi-directional current flowing from the control device in a single current path into two separate current paths that share a common conductor. The conversion circuitry extends between the first and second sets of terminals. The mounting element is used to mount the adapter to the control device. Since the wiring adapter contains the interface circuitry and necessary terminals, it may be easily installed or replaced in the field, for upgrade or maintenance purposes, with minimal disruption to power distribution services.