Siemens 6GK1900-0KL00-0AA0 Automation Connection Component. Siemens 6GK1900-0KL00-0AA0 is the exact manufacturer order number for a automation connection component in the SIMATIC NET PC Communication portfolio. Siemens describes this exact reference as: Termination kit Simplex plug Assembly case for On-site assembly of Simplex connectors to PCF FOC cables. The verified manufacturer lifecycle record is PM300: Active Product.