The Omron A6S-6104-H is a Programmable Logic Controller (PLC) that is designed for use in a variety of automation and control applications. It is capable of controlling and monitoring various devices, including sensors and other equipment. The A6S-6104-H is part of the A6S series of PLCs and features four inputs, four outputs, and five relay outputs to provide flexible control. It is capable of up to 2,048 steps, with 32 character program memory per step. It also has an instruction time of 0.8ms/step, and operates on AC/DC power of 125V AC, 24V AC/DC. The PLC is programmed with the provided ladder logic, and includes four status lamps to monitor PLC operations. It also has a real-time clock for time-based control, and can connect to other PLCs and PCs via Modbus TCP/IP.