The OKY3917 limit switch module manufactured by OKYSTAR is a type of industrial automation control switch designed for larger and more complex systems. This module features an extended range of detection and control, as well as a longer life cycle. It is designed for use with both NO and NC inputs, helping to reduce the complexity of wiring and materials. Additionally, it is equipped with a self-cleaning contact system that makes it both reliable, and with a low level of maintenance required. This switch is possible both as a standalone unit, or mounted on a switch assembly. It is rated for IP67 protection in wet environments, making it suitable for outdoor use.