The OPTO-22 part OAC5A is an I/O module with relay outputs, perfect for industrial automation and control applications. This module offers reliable performance with its ability to handle up to 4000Vrms isolation, providing enhanced safety and protection. Designed for easy installation, the OAC5A is a through-hole or plug-in module featuring a compact form factor. With its robust construction and advanced features, this module is an excellent choice for any control system requiring precise and reliable relay outputs.