In implementations, the I/O modules 204 can be used to control systems and collect data in applications including, but not necessarily limited to: industrial processes, such as manufacturing, production, power generation, fabrication, and refining; infrastructure processes, such as water treatment and distribution, wastewater collection and treatment, oil and gas pipelines, electrical power transmission and distribution, wind farms, and large communication systems; facility processes for buildings, airports, ships, and space stations (e.g., to monitor and control Heating, Ventilation, and Air Conditioning (HVAC) equipment and energy consumption); large campus industrial process plants, such as oil and gas, refining, chemical, pharmaceutical, food and beverage, water and wastewater, pulp and paper, utility power, mining, metals; and/or critical infrastructures.

In implementations, an I/O module 204 can be configured to convert analog data received from the sensor to digital data (e.g., using Analog-to-Digital Converter (ADC) circuitry, and so forth). An I/O module 204 can also be connected to a motor and configured to control one or more operating characteristics of the motor, such as motor speed, motor torque, and so forth. Further, the I/O module 204 can be configured to convert digital data to analog data for transmission to the motor (e.g., using Digital-to-Analog (DAC) circuitry, and so forth). In implementations, one or more of the I/O modules 204 can comprise a communications module configured for communicating via a communications sub-bus, such as an Ethernet bus, an H1 field bus, a Process Field Bus (PROFIBUS), a Highway Addressable Remote Transducer (HART) bus, a Modbus, and so forth. Further, two or more I/O modules 204 can be used to provide fault tolerant and redundant connections for a communications sub-bus.