Banner Engineering S15C Current Transformer to Modbus Converters are 4-pin M12-QD female-to-male connectors that meet IP65, IP67, and IP68 ratings and come with rugged overmolded housings. These connectors use split-core current transformers to monitor AC currents for various devices. The S15C-CT converters connect to the current transformers and output the value to Modbus registers. The current transformer inputs take a high-voltage current input and produce a proportional low-voltage, low-current signal for measuring and monitoring. The split-core current transformers are well-suited for installation into pre-existing electrical systems since they can securely attach around individual conductors without the need to disconnect any cables.