Product details pictures Product Overview: Siemens 6ES7277-0AA22-0XA0 Parameter Specification Brand Siemens Order Number 6ES7277-0AA22-0XA0 Product Name EM277 – PROFIBUS-DP Module Product Family SIMATIC S7-200 (expansion/communication module) Application & Fault Scenarios Typical Uses: The EM277 lets small S7-200-based machines join an existing PROFIBUS-DP backbone — typical in packaging and labelling cells, conveyor segments, dosing/mixing skids and retrofit projects where a