Whether you are a fleet operator wanting to bypass expensive POS licensing, a C-store owner integrating loyalty rewards directly into the nozzle, or a hobbyist reviving a classic dispenser, the two-wire protocol is your golden ticket.
The converter then translates this into the two-wire current loop pulse train. Within 50ms, the Gilbarco dispenser activates the relay for that hose. The two-wire protocol returns pulses as a frequency. The new converters output these as standard quadrature encoder pulses or Modbus registers. Your third-party pump controller can now read real-time flow data with sub-penny accuracy. Part 4: Benefits of the New Two-Wire Approach Over Alternatives Why go through the trouble of two-wire when you could use IFSF (International Forecourt Standards Forum) or Ethernet? Whether you are a fleet operator wanting to
The answer is . UL and ATEX certification for hazardous locations (Class I, Division I) prohibit unlicensed radio transmitters inside dispenser cabinets. The two-wire loop is intrinsically safe (with proper barriers). The new trend is "Two-Wire-to-5G" gateways: a third-party pump controller located in a back office (or the cloud) sends HTTPS requests to a small gateway box, which then speaks two-wire to the dispensers. The two-wire protocol returns pulses as a frequency
| Feature | Two-Wire (New Method) | Ethernet / IFSF | Traditional DBox | | :--- | :--- | :--- | :--- | | | <20ms (Critical for presets) | 100-200ms | 500ms+ | | Cabling Cost | Low (existing twisted pair) | High (Cat6/Fiber needed) | Very High (Proprietary) | | Third-Party Support | Newly accessible via converters | Native (if dispenser supports) | Poor (license fees) | | Legacy Dispensers | Works on 20-year-old units | Requires new dispenser | Works but costly | Part 4: Benefits of the New Two-Wire Approach