The H3YN-2-AC200-230 is part of the Omron H3YN series of time relay switches. It is a single-function timing relay with a built-in timer and an AC output of 200–230 volts. The timer can be set from 0.1 seconds to 10 hours, and it also has a one-shot mode. It also has an LED indicator for showing on/off status and error codes for easy troubleshooting. The relay is designed for use in a variety of applications including temperature control, traffic control, lighting, production machines, and security systems.