Glossary · Electrical engineering and control panels
Connector
Also known as: Plug connector, Industrial connector
German: Steckverbinder
In electrical engineering, a connector is a device that makes a detachable electrical connection between cables, or between a cable and a device, through mating plug and socket parts.
- Control panels
In one sentence
A connector makes a detachable electrical connection between cables or devices through mating plug and socket parts.
Example
Each sensor on the conveyor connects with an M12 connector, so a failed sensor can be replaced in minutes without rewiring.
How it applies
- Engineering: Industrial connectors are specified by type (such as M8, M12, heavy-duty rectangular), pin assignment, coding, current and voltage rating and IP rating. Coding prevents mismating connectors of different functions. Standards such as the IEC 61076 series define common sensor connectors.
- Safety: Connectors for hazardous voltages must not be disconnected under load unless designed for it, and exposed pins must not become live.
- Documentation: Document pin assignments and coding in the circuit diagram and in replacement instructions. Warn against unplugging under load where relevant.
Connector vs. terminal block
A connector is designed to be separated and reconnected in the field. A Terminal block makes a fixed connection that requires tools to change.