What this part is
The 6ES7972-0CA30-0XA0 is a SIMATIC S7 Teleservice Adapter that connects a modem to S7-300 (without FM353/354/357), S7-400, M7, and C7 systems, performing RS232 to RS485 conversion.
Lifecycle and sourcing reality
This part is discontinued. There is no official successor listed in the evidence. Sourcing is limited to surplus or broker channels — submit an RFQ for current availability and pricing.
Physical handling note
Weighs 0.13 kgs, so it's a light component for panel or shipping logistics.