Allen-Bradley 6171-MX5 Serial/Parallel Expander Module is an Advisor PC expansion card that adds serial and parallel I/O to a PC-based control system, extending communication options for PLCs and peripheral devices. It is part of Allen-Bradley's Advisor PC Serial/Parallel Expander lineup, with other MX-series models such as 6171-MXS (4 serial, 1 parallel) and 6171-MX8 (6 serial, 2 parallel) offering different port configurations. This module is intended for use in Advisor PC configurations to expand legacy serial and parallel connectivity without altering the main controller.
