Siemens 6GK1500-0DA00 Automation Connection Component. Siemens 6GK1500-0DA00 is the exact manufacturer order number for a automation connection component in the SIMATIC NET PC Communication portfolio. Siemens describes this exact reference as: bus terminal RS 485 for PROFIBUS with plug-in cable 1.5 m. The verified manufacturer lifecycle record is PM300: Active Product.