Siemens 6GK1900-0NB00-6AA0 Automation Connection Component. Siemens 6GK1900-0NB00-6AA0 is the exact manufacturer order number for a automation connection component in the SIMATIC NET PC Communication portfolio. Siemens describes this exact reference as: IE SC RJ PCF plug pro, FOC Connector for on-site assembly with PCF FOC cables (packing unit 1 duplex plug). The verified manufacturer lifecycle record is PM300: Active Product.