The Siemens 3RK1000-0JC80-0BA2 is a PROFIBUS-DP interface module that connects 3WN6 circuit breakers to a PROFIBUS-DP network via RS485, using a 3-meter 3WN6 connecting cable. It sits in the PLC Expansion Modules category and is functionally a communication gateway between the breaker and the control system. This is an active-production part, so it's available through standard Siemens distribution channels without lifecycle concerns.
The module mounts in a control panel as part of a PROFIBUS-DP segment, typically alongside a PLC master and other DP slaves. The RS485 connection and dedicated 3-meter cable mean it's a drop-in link between the 3WN6 breaker and the bus — no field wiring of the communication pair is needed.