A2 PC USB Programming Cable Siemens Simatic S7-200 PLC S7-300 PLC S7-400 PLC Replaces 6ES7 972-0CB20-0XA0 Compatible Step7 MPI PC Adapter USB : Electronics - Amazon.com
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Amazon.com: PLC Cable for Siemens S7 200/300/400 6ES7 972-0CB20-0XA0 USB-MPI+ PC USB-PPI : Electronics