What it is and where it fits
The Siemens 3RK1911-1AF32 is an ECOFAST hybrid fieldbus connection that transitions a PROFIBUS line from an IP20 control cabinet environment out to an IP65-rated field device. It merges the bus signal and a 2-channel power supply into a single hybrid cable, using CU/CU pin/socket contacts for forwarding. This is the piece that gets your PROFIBUS DP signal and 24 VDC power out to a motor starter or valve island on the machine frame without a second junction box.
Compliance note
The substance prohibitance date is 01.07.2006, which aligns with the original EU RoHS directive (RoHS 1) effective July 2006. This means the part is compliant with the initial RoHS substance restrictions. No further compliance documentation details (REACH, UL, IEC) are carried in the spec record for this order code.