An Omron communication relay is an industrial device designed to facilitate communication between different equipment, such as programmable logic controllers (PLCs), human-machine interfaces (HMIs), sensors, and actuators. These relays act as intermediaries, ensuring that data, control signals, and commands are accurately transmitted from one device to another in real-time. Omron's communication relays support a wide variety of communication protocols, including Modbus, Ethernet, CANopen, and others, making them highly versatile for different industrial environments.