Siemens 6ES7972-0CA23-0XA0 is the SIMATIC S7 PC Adapter V5.1 that provides RS232-to-RS485 conversion for connecting a PC to S7-300/400, C7, and M7 controllers. The adapter offers an RS232 interface for the PC side and an RS485 interface to the PLC network, and it ships without an RS232 cable. Its compact body measures 50 x 24 x 108 mm and weighs about 150 g, with an IP20 enclosure rating suitable for installation inside control cabinets. The device supports RS232 baud rates of 19.2 kbit/s or 38.4 kbit/s, selectable by a switch, and is identified by MLFB 6ES7972-0CA23-0XA0, Version V5.1.
