Used to "fan-out" communication to multiple dispensers and may include modern components like the BRCM2 for adding high-speed TCP/IP signals over the same wire pair.
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 with sub-penny accuracy.
Breakdown: Start (*), Address (04), Preset (P), 2000 (cents), Stop (L). Used to "fan-out" communication to multiple dispensers and
The converter then translates this into the two-wire current loop pulse train. Within 50ms, the Gilbarco dispenser activates the relay for that hose.
At its core, the Two-Wire Protocol is a communication standard. Unlike modern voltage-based standards like RS-232 or RS-422, a current loop transmits data by modulating the current flowing through a simple pair of copper wires. Your third-party pump controller can now read with
The Gilbarco system operates on a nominal loop current of . This current signal is typically driven directly by a PC's serial COM port via an appropriate interface converter. This physical layer is simple and rugged, designed for reliability in electrically noisy forecourt environments over long distances.
To connect a Gilbarco dispenser to a new third-party controller, specific hardware and software integration must take place. 1. The Interface Unit / Converter Within 50ms, the Gilbarco dispenser activates the relay
For newer installations, Gilbarco has introduced high-speed communication technologies like the Invenco Link
The phrase is no longer a fantasy for electrical engineers. It is a practical reality driven by open hardware, expired patents (on older versions of the protocol), and a market demand for agnostic forecourts.
Fuel station operators often choose to use third-party pump controllers rather than proprietary Gilbarco site controllers for several reasons: