79720CB20OXAO optical isolation module Key benefits Provides reliable Siemens S7200/300/400 PLC communications with industrialgrade protection Optical isolation for the USB port and RS485 ports, with surge protection and lightning protection circuitry Designed for fullrange coverage of Siemens S7200, S7300, and S7400 series PLCs Protects the system in interferenceprone industrial environments to help ensure safe operation What it does Enables robust USB and RS485 communication to Siemens S7 family PLCs while safeguarding the interface from electrical noise and transients Yashiro 0CB20 USB to MPI/PPI converter Key benefits USB to MPI and PPI protocol conversion for Siemens PLCs Allows a PC USB port to communicate with Siemens S7300/400 via MPI or with S7200 via PPI Facilitates uploading and downloading of programs and data to and from the PLCs Compatibility and software Supports Windows 7 (32bit and 64bit) Compatible with V5.5 software (no driver installation required in V5.5) Applications and use scenarios PLC programming and data transfer for Siemens S7200, S7300, and S7400 series in factory automation Onsite maintenance and field diagnostics in environments with electrical noise and RS485 networks Retrofit, upgrade, or integration projects requiring USBtoMPI/PPI connectivity for Siemens PLCs with PC software tools Notes The product combines two related items: the 79720CB20OXAO optical isolation module and the Yashiro 0CB20 USBtoMPI/PPI converter, each supporting Siemens S7200/300/400 PLCs and their respective communication protocols Emphasizes function, compatibility, and protective features without adding extraneous details beyond the original specifications