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

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:

Enter the renewed focus on the . While the physical two-wire loop has existed for years (handling pulser data and sale authorization), a new wave of innovation has arrived. Recent advancements in protocol translation hardware and software are finally cracking the code, allowing third-party pump controllers to leverage this robust, low-latency communication method like never before. The Gilbarco two-wire protocol is a (0–50 mA

The Gilbarco Two-Wire protocol is a proprietary serial communication standard based on a 45mA current loop then to dispenser 2

October 26, 2023 Subject: Interface Specifications & Integration Guide for Gilbarco Dispensers Audience: System Integrators, POS Developers, Forecourt Controller Engineers 7 data bits

| Parameter | Specification | | :--- | :--- | | | 20mA Current Loop (not RS-232 voltage levels) | | Topology | Daisy-chain (one pair of wires from controller to dispenser 1, then to dispenser 2, etc.) | | Wire Type | Twisted pair, shielded (Belden 8760 or equivalent) | | Max Distance | 2000 ft (600m) per loop | | Communication | Half-duplex, asynchronous | | Baud Rate | 1200 bps (fixed, non-configurable on most legacy dispensers) | | Data Format | 1 start bit, 7 data bits, even parity, 1 stop bit |