Siemens 6ES7 972-0BB12-0XA0 Profibus DP Bus Connector

Siemens 6ES7972-0BB12-0XA0 is a PROFIBUS DP bus connector that attaches PROFIBUS cables to SIMATIC DP interfaces in SIMATIC NET PROFIBUS networks. It supports operation up to 12 Mbit/s and features a 90-degree cable outlet, enabling compact panel installation. The enclosure footprint is 15.8 x 64 x 35.6 mm (WxHxD), and it includes a terminating resistor with an isolating function to maintain bus integrity. A PG receptacle is included, allowing connection of a programming device without disconnecting the bus configuration. This model is the 6ES7 972-0BB12-0XA0 variant, and Siemens catalogs also reference the 6ES7 972-0BB50-0XA0 as a related bus-connector option. Typical use cases include linking a PROFIBUS DP master/slave interface to the bus cable in control cabinets or PLC panels, providing a robust RS-485-based PROFIBUS connection per the DP standard. The device is marketed as a PROFIBUS connector for SIMATIC DP, with official product pages and data sheets listing its key specs and PG port functionality.