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: Only the master console can initiate communication, preventing data collisions.
Before software development begins, the physical interface must be correctly established. : Only the master console can initiate communication,
The master (controller) initiates all communication, and the slave (dispenser) only replies. 2. Why Use Third-Party Pump Controllers? B&B Electronics 232CL
At its heart, the Gilbarco Two-Wire Protocol is a that uses just two wires for both power and data transmission. This design makes it highly robust against electrical noise, a common problem on fueling forecourts. or build with 4N35 optos).
⚠️ Using RS-232 or RS-485 transceivers directly – will damage the dispenser’s interface. You need a current-loop converter (e.g., B&B Electronics 232CL, or build with 4N35 optos).