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Siemens 6ES7972-0CA22-0XA0 — PLC Accessories

Siemens 6ES7972-0CA22-0XA0 SIMATIC S7 PC Adapter V5, RS232 t

MPN6ES7972-0CA22-0XA0

Siemens SIMATIC S7 PC Adapter V5, 6ES7972-0CA22-0XA0, RS232 to RS485 converter for S7-300/400, C7, M7, 19.2/38.4 kbit/s.

$217.17Ref. price · indicative, final on quote
Siemens 6ES7972-0CA22-0XA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7972-0CA22-0XA0 — Specifications
ParameterValue
Weight0.25 kgs

Product details

The Siemens 6ES7972-0CA22-0XA0 is a SIMATIC S7 PC Adapter V5 that connects a PC without a free slot to S7-300/400, C7, and M7 controllers. It converts RS232 at 19.2 or 38.4 kbit/s to RS485, giving you a programming and diagnostic link when the laptop lacks a dedicated MPI/PROFIBUS port.

This adapter is classified as mature in its lifecycle stage, meaning it is no longer in active volume production but remains available through distribution channels.

The RS232 side runs at 19.2 or 38.4 kbit/s — standard for STEP 7 upload/download and online diagnostics on older S7-300/400 racks. The RS485 side connects to the MPI or PROFIBUS port on the CPU. No free slot needed on the PC; the adapter sits inline between the serial port and the PLC.

Frequently asked questions

What is the closest functional alternative to 6ES7972-0CA22-0XA0?

The 6ED1053-1FG00-0BA0 is a different class of device — a LOGO! expansion module, not a PC adapter. It will not drop into the same application without rewiring and a logic controller change. For a direct RS232-to-RS485 adapter function, stick with the 6ES7972-0CA22-0XA0 or its successor if one is specified.

What does the PC Adapter V5 do?

It converts an RS232 serial port (19.2 or 38.4 kbit/s) to RS485, allowing a PC without a free slot to connect to the MPI or PROFIBUS port of S7-300/400, C7, and M7 controllers for programming and diagnostics.

MPN
6ES7972-0CA22-0XA0