Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New Work -

The Gilbarco two-wire protocol is a (0–50 mA typical) used on Gilbarco dispensers (e.g., Encore 500, 700, Eclipse, and earlier Highline models). It allows a remote controller to:

: Sending specific volume or currency limits to the dispenser before fueling begins. Status Monitoring

When developing a new Pump Controller, the following workflow is recommended: The Gilbarco two-wire protocol is a (0–50 mA

The most common failure point for third-party developers is the handshake.

Commercial interfaces from vendors like Levtech or Technotrade provide plug-and-play conversion for POS and OPT systems. RS-232 to Two-Wire Converter Box Kit It supports longer cable runs and is less

: A single physical 2-Wire communications loop supports up to 16 active fueling positions .

While exact byte structures are proprietary, the general frame structure for the Two-Wire protocol typically follows this logic: your controller must:

One alternative is the interface, a faster and more robust differential serial standard often used for CRIND devices. It supports longer cable runs and is less susceptible to electrical noise.

As fuel stations evolve into multi-functional retail hubs—integrating electric vehicle (EV) charging, alternative fuels, and advanced IoT edge devices—third-party manufacturers are increasingly developing custom forecourt controllers.

To correctly implement the Gilbarco two-wire protocol, your controller must: