Siemens simatic tp 177 5 7in micro touch panel for s7 200 rs 422 485 siemens 6av6642 0aa11 0ax1 this touch panel is for the control and monitoring of s7 200 family equipment the panel has a 5 7in full graphic touch screen lcd display with numeric alpha and hexadecimal input the unit features a messaging system with more features and performance siemens 6av6642 0aa11 0ax1 simatic tp 177a touch panel