: Gilbarco dispensers and CRIND devices typically operate on a 45mA loop, while some non-Gilbarco units may use 30mA.
| Feature | Gilbarco Two-Wire (Legacy) | RS-422 / EDH (Modern) | Omnia Board / Wireless (New) | IFSF (Open Standard) | | :--- | :--- | :--- | :--- | :--- | | | Pump control, basic data | CRIND (card reader), high-speed data | EMV upgrades, forecourt retrofits | Next-gen POS & controller integration | | Physical Layer | 45mA Current Loop (2 wires) | RS-422, RS-232 (multiple pairs) | 802.11 wireless | TCP/IP over Ethernet | | Topology | Shared loop (daisy chain) | Point-to-point | Star (via wireless access point) | Switched Ethernet (star) | | Typical Baud Rate | 4800, 5787 baud | Up to 19,200 baud | Same as standard network | 100 Mbps / 1 Gbps | | Key Advantage | Simple, rugged, long distance | Faster, less noise, dedicated | No trenching, remote updates | Future-proof, multivendor | | Key Disadvantage | Shared loop = single point of failure | More wires, more complex | Requires power, potential interference | Requires modern POS |
PTS controller over fuel dispensers and ATG systems for petrol stations : Gilbarco dispensers and CRIND devices typically operate
The customer has lifted the nozzle, signaling a request for authorization.
| Issue | Resolution | | :--- | :--- | | | Check current loop polarity – swap A/B wires. | | Intermittent drops | Ensure total loop resistance < 500Ω. Add terminator (120Ω) only at last dispenser. | | Parity errors | Third-party controller must use Even parity – not none, odd, or mark/space. | | Handle drops | Dispenser requires polling every 100-200ms; long gaps cause auto-cancel. | | | Intermittent drops | Ensure total loop
The nozzle was returned to the boot. The final volume and currency totals are locked in memory waiting for a clearing signal. B. The Authorization Command
The Gilbarco dispenser two-wire protocol offers several benefits to fueling station operators, including: | | Handle drops | Dispenser requires polling
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).
Sent when the pump enters the "Collect" state. It pulls final transaction metrics (Total Volume, Total Cost, Grade Selected).