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The charging station puts 12 V on the Control Pilot (CP) and the Proximity Pilot (AKA Plug Present: PP) measuring the voltage differences. This protocol does not require integrated circuits, which would be required for other charging protocols, making the SAE J1772 robust and operable through a temperature range of −40 °C to +85 °C.
The PP, or Proximity Pilot, pin carries a low-voltage signal and is used to determine the status of the vehicle connector. When the button on the plug is depressed to unlock the connector, a switch on the Proximity Pilot circuit is opened, stopping the flow of electricity. Pin usage is the same as the SAE J1772 connector when used for AC ...
In addition to the AC power contacts and protective earth, there is a single control pilot communication pin in the Type 3A interface, which verifies the continuity of the protective earth circuit. The maximum rated current and voltage are 16 A and 200–250 V, respectively. [5]: 57 This is defined as Mode 2 charging under IEC 61851.
From left: IEC Type 1/SAE J1772 inlet; Tesla NACS outlet; IEC Type 2 connector outlet IEC 62196 Plugs, socket-outlets, vehicle connectors and vehicle inlets – Conductive charging of electric vehicles is a series of international standards that define requirements and tests for plugs, socket-outlets, vehicle connectors and vehicle inlets for conductive charging of electric vehicles and is ...
J1772 has a maximum output of 19.2 kW. [ 9 ] In North America, the same Type 2 physical connector is used for three-phase AC charging under the SAE J3068 standard, which uses Local Interconnect Network (LIN) for control signaling based on IEC 61851-1 Edition 3 Annex D. [ 10 ] [ 11 ] J3068 increases the maximum output to 166 kW using three-phase AC.
The project started in February 2011, [4] [1] with an experiment aimed at generating the SAE J1772 pilot signal [5] on an Arduino-compatible ATmega328 8-Bit AVR MCU. Subsequent experiments continued until a prototype J1772-compatible controller was created. As of now, OpenEVSE powers charging stations all over the world. [6]
CCS1 (Combined Charging System Combo 1) plug as used in North America. It is an extension of the J1772 standard AC charging connector. CCS Combo 1 vehicle inlet showing the J1772 and the two DC fast-charging pins Connectors: Incomplete Combo 2 (left) showing the two large direct current (DC) pins below, while the four alternating current (AC) pins for neutral and three-phase are removed, while ...
On J1772 there is no "Proximity Pilot". There is a "Control Pilot" and a "Proximity". Confusingly, "Proximity Pilot" is a distinct, third thing that is used on Type 2 / Mennekes connections for the (removable) cable to signal its current capacity upstream to the EVSE. E.g. so a 16-amp rated cable plugged in to a 32 amp EVSE won't get overloaded.