While the Two-Wire protocol is remarkably stable, newer Encore 700 S models may utilize extended data packets compared to legacy Highline series pumps.
+-----------------------------------+ | Third-Party Forecourt Controller | | (Master / Current Loop) | +-----------------+-----------------+ | [2-Wire Current Loop] | +-----------------------+-----------------------+ | | | +--------+--------+ +--------+--------+ +--------+--------+ | Gilbarco Dispenser| | Gilbarco Dispenser| | Gilbarco Dispenser| | Address #1 | | Address #2 | | Address #16 | | (Slave) | | (Slave) | | (Slave) | +-----------------+ +-----------------+ +-----------------+ Core Specifications Gilbarco Two Wire Protocol Interface | PDF | Usb - Scribd
The Gilbarco Two-Wire protocol is a proprietary serial communication standard designed for data exchange between Gilbarco dispensers and control systems (like POS or forecourt controllers) using a single pair of wires While the Two-Wire protocol is remarkably stable, newer
: "Corporate baudrate" used for Highline-III, Encore, and Eclipse series.
It often uses a 20mA current loop for data transmission, ensuring long-distance communication between the dispenser and the controller. Despite being a proprietary protocol, it has become
Despite being a proprietary protocol, it has become a "standard" in the industry, with most major third-party controllers (DOMS, POSTEC, Tokheim) supporting it.
With the rise of cloud-based POS , automatic vehicle identification (AVI) , and EV charging integration , third-party controllers (e.g., Fuellogic, Raytec, Syntech, FMS) are actively seeking two-wire support as a backward-compatible option. Device Discovery and Polling The PPC must be
[Idle / Polling] ──> [Authorize] ──> [Fueling / Status Updates] ──> [Final Transaction Data] 1. Device Discovery and Polling
The PPC must be capable of:
The Gilbarco dispenser must be configured to "talk" the two-wire protocol (e.g., setting the correct dispenser address and baud rate via the dispenser's interface).