Siemens simatic tp 177 5 7in micro touch panel for s7 200 rs 485 siemens 6av6640 0ca11 0ax1 a basic touch panel with a 5 7in full graphic lcd display the panel has numeric alpha and hexadecimal input and has a 4x blue level display designed for the control and monitoring of machines in the s7 200 family siemens 6av6640 0ca11 0ax1 micro touch panel