These cords run the automated world, from robot arms and photoelectric sensors to PLCs and IO-Link devices. The original metric circular cord, they continue to be the standard today. They screw together tightly to protect against contaminants and hold firm against high vibration. Each one has a coding that indicates a unique keyway, preventing mismated connection errors before they happen. The coding also tells you whether a cord can send power, control, or both, reducing the need for multiple cords.