Sensor assembly includes a modular device and a cable assembly configured to communicatively couple the modular device and a control system and transmit digital signals therethrough. The cable assembly includes a cable jacket surrounding a channel and a twisted pair extending through the channel. The coated twisted pair includes first and second signal wires that each include a respective signal conductor and an insulation layer that surrounds the respective signal conductor. The coated twisted pair also includes a ground conductor. The first and second signal wires are twisted about one another. A twist exterior is defined by corresponding exterior surfaces of the first and second signal wires and the ground conductor. The twist exterior is coated with a conductive material.