Limitek

Limitek is a term used in industrial automation to describe a family of limiter technologies that enforce predefined operational limits on processes and equipment. The concept is applied across hardware and software implementations, and there is no single universal specification. In practice, limitek systems monitor one or more process variables and trigger protective actions when limits are reached.

A typical limitek solution comprises sensors or input signals, a thresholding or rule engine, and an output that may stop, slow, or otherwise modify the process. These systems are designed to be configurable, with upper and lower limits, optional hysteresis to prevent rapid switching, and fail-safe behavior in case of sensor or communication faults. Data logging and event reporting are common features to support quality assurance and compliance.

Hardware and software implementations vary. Some products are embedded modules that integrate with PLCs or field devices, while others are software libraries or cloud-based services that provide limit-checking logic for operating data streams. Supported communication protocols and interfaces often include Modbus, CAN, EtherCAT, OPC UA, and standard digital/analog I/O.

Applications of limitek technologies span process control, machine safety, energy management, and data validation. They are used to prevent equipment damage, protect personnel, maintain product quality, and support regulatory or internal standards. Variants may target different industries or performance levels, but all share the goal of enforcing safe and efficient operation through defined limits.

See also: limit switch, safety interlock, process control, protective relaying, fault handling.