The Allen Bradley AB 97239471 Compact Block I/O 1791D-0B16PX /D is a series SER D PLC input/output module designed for industrial automation and motion control systems. Manufactured by Allen Bradley, a trusted brand in industrial automation, this compact block module is part of the 1791D model line. With the ability to provide reliable and efficient input/output functionality, this module is a valuable addition to any PLC system requiring high-quality peripherals. Its compact design and specific model number make it easy to identify and integrate into existing automation setups.