- I/O module: Input/Output module used in control systems to interface between the controller (e.g. PLC) and field devices like sensors and actuators.
- In-delta connection: A wiring method for soft starters or current transformers where the device is connected within the delta loop of a three-phase motor, reducing the current flowing through the starter.
- Indicator light, General symbol: The standardized schematic symbol used to represent visual indicator devices such as pilot lights.
- Individual compensation: Power factor correction method where capacitors are installed directly on each individual load or motor, ideal for decentralized systems.
- In-line connection: A straight-through wiring method where conductors or devices are connected end-to-end, minimizing installation space and complexity.
- Input modules: Components in a control system that receive signals from external devices (e.g. switches, sensors) and pass them to a controller.
- Insulated enclosures: Protective housings made from insulating materials that prevent electric shock and provide environmental protection for electrical components.
- Insulated monitoring relays: Relays that monitor insulation resistance in a system to detect degradation or faults, ensuring safety in critical installations.
- Interface: The point or protocol through which two systems or components communicate, such as between a PLC and a sensor.
- Interlock circuits, cam switches: Electrical safety systems that prevent conflicting operations (e.g. forward and reverse) from occurring simultaneously, often integrated into rotary switch configurations.
- International Unit System (SI): The globally accepted system of measurement units (e.g. meters, amperes, seconds), used for consistency in engineering documentation and component ratings.
- Inverter module: A power electronics module that converts DC to AC, used in variable frequency drives (VFDs) to control the speed of motors.
- IP20: A classification under the Ingress Protection (IP) code indicating protection against solid objects larger than 12.5 mm but no protection against liquids.
- IP66: A high level of enclosure protection indicating total dust tightness and protection against powerful water jets, suitable for harsh environments.
- Isolating point, General symbol: The standard symbol used in diagrams to represent a disconnection or isolation point, typically for maintenance or safety shutdown purposes.
Published by Leonardo Tomás Cardillo
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