The Allen Bradley AB Devicenet Scanner Module 1771-SDN /B is a peripheral module designed for use with PLCs and HMI systems. Manufactured by Allen Bradley in the United States, this scanner module is part of the PLC5 series and is specifically designed for industrial automation and motion control applications. The 1771-SDN model is known for its reliability and performance in a variety of industries, making it a popular choice for businesses looking to enhance their automation systems.