The DB9 PLC MicroLogix Cable typically has a DB9 connector on one end, which is plugged into the DB9 port of the PC, and a specialized connector on the other end, which connects to the programming port of the MicroLogix PLC. The programming port on the MicroLogix PLC is usually an RS-232 serial port with an adapter. By using this cable, users can establish a communication link between the PC and the MicroLogix PLC, allowing them to program, configure, monitor, and troubleshoot the PLC. Programming software, such as RSLogix 500 or Studio 5000, is used on the PC to create and edit the logic and functions that the PLC will execute. PLC Micrologix Cable, USB Interface Compatible PLC Micrologix 1000 1200 1400 Series with USB-1761-CBL-PM02 8 Pin Round Aapater