Phoenix Contact 1139022 The CHARX control modular is a standalone AC charging controller with an embedded Linux system and complies with IEC 61851-1 standards. It operates in three modes: Stand-Alone, Client, and Server and features Ethernet connectivity with two ports. This system uses a modular bus and has communication protocols including OCPP 1.6J, Modbus/TCP, MQTT, and supports connectable peripherals such as energy meters, RFID, DC residual current detection, and can be mounted on DIN rail.