What it is and what it does
The Siemens 6GT2891-0GN10 is a pre-assembled RS-232 connecting cable for the SIMATIC RF600 series, specifically the RF660R reader. It runs 10 meters between the SLG (reader) and a PC via a 9-pole D-sub connector, with a PUR jacket rated IP65 at the SLG end.
What the ratings mean for fit
The 10-meter length and RS-232 interface are the key fit parameters — if your RF660R is already deployed and the existing cable needs replacement, this is the exact OEM part. The PUR jacket and IP65 rating at the SLG end mean it handles washdown environments at the reader connection, which is typical for food, beverage, or logistics lines where the reader sees moisture.