J1772 Active Vehicle Control Board - AVC2
View Wiring Diagram
AVC1 came together a few years ago. It improves the J1772 pilot communications and power control.
It’s intended for conversion vehicles to improve the safety and compatibility with public J1772 charging stations.
Units like our adapters take advantage of the differing pin lengths to insure ground mates first and breaks last. The pin lengths also insure the power pins are mated before the pilot and the pilot ends before the power pins separate.
This module monitors the latch switch in the J1772 system and removes the pilot signal when your thumb is on the connector latch further insuring power is off long before the connector separates.
The J1772 connectors are not designed to ever mate or separate with power on.
There are 8 connections and the module is powered by the vehicles 12 volt system, current draw is always under 20ma.
Relay NO - Normally Open
Relay C - Common
Relay NC - Normally Closed
+12 power from the vehicle
CH chassis ground (and AC power ground)
GND green wire from J1772 Inlet Connector
PROX prox wire from J1772 Inlet Connector
PILOT pilot wire from J1772 Inlet Connector
The SPDT relay has a set of contacts for your use.
Soft start or stop of charging or inhibiting motion would be typical uses
A LED shows when the circuit is latched.
The new version is AVC2.
It’s the same unit packaged in a box with mounting ears and better terminal marking.
The AVC2 is a small circuit board in a box to monitor and control the pilot signal from a J1772 Inlet connector in the car. It provides the control needed to tell the EVSE (charging station) that the car is connected and, when the connector is fully latched, it requests electrical power. It has a circuit to monitor the proximity pin in the J1772 connector that indicates if the connector is latched. This helps sequence the power so it is always fully off when the connector is mated or disconnected. It also provides a relay contact indicating the connector is latched that can be used to inhibit motion while charging or control an LED to indicate charging.
The AVC2 is for vehicle inlets that have a 2.74K resistor between ground and the PROX pin, like the ITT units.
The AVC2.r is for vehicle inlets that do not have the 2.74 K resistor between ground and the PROX pin. The resistor is built into the module and this would be used with our aluminum connectors.
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