New !!top!! — Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers

To understand the "new," you must first understand the "old." The Gilbarco two-wire system (often referred to as the G-Site or Bi-directional asynchronous protocol) is a serial communication standard that runs over a simple, unshielded twisted pair of copper wires.

The interface is an optically isolated active current loop. To understand the "new," you must first understand the "old

5. Challenges and Best Practices for Third-Party Engineering Blend ratios (for blending dispensers)

During active fueling, the controller polls the dispenser frequently (typically every 100–200 milliseconds). The dispenser responds with real-time delivery data: Current volume delivered (up to 3 decimal places). Running monetary total. Blend ratios (for blending dispensers). 4. Transaction Finalization To understand the "new

: Typically driven by a 12VDC unregulated supply at the distribution box. 2. Interfacing Third-Party Controllers RS-232 to Two-Wire Converter Box Kit

If you are currently developing or debugging a third-party pump controller interface, let me know which stage you are working on. I can provide explicit details on the , clarify the exact byte sequences for specific pump commands, or help troubleshoot hardware circuit designs for the active current loop interface.

: Up to 16 fueling positions can typically be connected per dispenser communication channel. Third-Party Controller Integration