What it is and where it fits
The 6ES7194-4MA00-0AA0 is a spare-part antenna for the SIMATIC DP Interface Module IM 154-6 IWLAN. Omnidirectional pattern, terminated with an R-SMA connector. Comes two to a bag — a packing unit is two pieces, so don't expect singles.
Mounting and connection
R-SMA male connector threads onto the IM 154-6 IWLAN module directly. Omnidirectional pattern.