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6ES7901-3BF20-0XA0 is identified by Siemens as a Serial Cable within the Simatic S7 family.
System cables carry power, signals, or communication between designated control-system assemblies. Connector type, pin assignment, routing, and required length must match the installed equipment. Its role should remain distinct from that of similarly named assemblies.
Within an S7 installation, the exact hardware order number determines supported interfaces and configuration behavior. System and software compatibility should be checked before replacement. The documented module assignment should remain the basis for selection.
In the signal path, this approach helps preserve the intended system function while keeping selection aligned with the documented ratings, capacity, and compatibility requirements. Installation should follow the control node's approved hardware records.
"Ahoy! We are extremely pleased with the cost effective and rapid repair services provided DCS Center. Even though the ship is only 12 years old, many of the..."
- Birdman Chief Engr., United States"I would like to say thanks a lot for all. I’ve had good service with you and it’s a pleasure"
- Audrey, Québec, Canada"DCS CENTER Really saved the day! I had the parts I needed in my hands the day after ordering ( I'm in Toronto Canada ). I highly recommend..."
- Steven T., United States"Thank you very much for your prompt and professional assistance!"
- Brent M., United States"Dear Frank and James, This morning we tested the "new" IEPAF01 cards. Everything is fine!!! I want to express my thanks and my personal acknowledgement on how you..."
- Carmelo I., Italy"Frank your customer service has been excellent, you go out of your way to help and support. Your response and feedback is exceptional, its a pleaure to engage..."
- Selva Moodley, South AfricaDCS Center sells new surplus and reconditioned products. This website is not sanctioned or approved by any manufacturer or tradename listed. DCS Center is not an authorized distributor or representative for the listed manufacturers. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.
Keep your operation moving with fast access to the DCS and PLC components you need. Whether you are searching for a hard-to-find part, need a repair, or want help identifying the right replacement, DCS Center is here to simplify the process and minimize downtime.
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