Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New May 2026

A multi-drop loop supporting up to 16 fueling positions on a single pair of wires. Communication Model

Connecting a standard PC or a modern PLC to a Gilbarco dispenser often requires an interface converter to bridge the gap between RS-232/USB/RS-485 and the 2-wire current loop.

Understanding the Gilbarco Dispenser Two-Wire Protocol The is a proprietary communication standard used to interface Gilbarco fuel dispensers with Point-of-Sale (POS) systems and third-party pump controllers . It operates on a current loop principle, traditionally at 45 mA , although variants like 20 mA or 60 mA may be encountered depending on the specific hardware. Core Technical Specifications