Amazon.com: DCYNXC Compatible with Siemens PLC Programming Cable S7-200/300/400 Data Download Line 6ES7972-0CB20-0XA0,USB/MPI PC Adapter USB Cable for Siemen S7-200/300/400 PLC MPI/DP/PPI Programming Cable 16ft : Electronics
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6ES7-901-3CB30-0XA0 RS232 / PPI Multi-Master Cable - Price, Specs
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Siemens PLC S7 USB to MPI ProfiBus DP PPI 32 64 bit 6GK1571-0BA00-0AA0 - PLCCable.com - Automation Supplies and PLC Tools
Amazon.com: DCYNXC Compatible with Siemens PLC Programming Cable S7-200/300/400 Data Download Line 6ES7972-0CB20-0XA0,USB/MPI PC Adapter USB Cable for Siemen S7-200/300/400 PLC MPI/DP/PPI Programming Cable 16ft : Electronics