The OPTO-22 part IAC5 is an I/O module designed for use in industrial applications. This module features relays and serves as an input module, allowing for the connection of external devices for monitoring and control. It operates within a voltage range of 90VAC to 140VAC with a low current consumption of 5mA. With a high isolation voltage rating of 4000Vrms, this module provides reliable and safe performance. The Thru-Hole design ensures easy and secure installation.