M12 Circular Connectors & Cable Assemblies Phoenix Contact M12 Circular Connectors and Cable Assemblies are available in a wide selection of designs to enable comprehensive connection solutions for devices with data rates up to 10Gbps. These connectors can also be used for connecting signals up to 17 positions and for supplying power up to 630V and 16A in small installation spaces. The modular structure of the connectors facilitates the simple and cost-effective integration of various data, signal, and power supply pin assignments into a device concept.