What it is and where it fits
This is the specific spare part terminal block for the ET 200B distributed I/O family — order code 6ES7193-0CA20-0XA0. It accepts 4-wire screw terminals on one side and spring terminals on the other, mating digital electronic submodules to the PROFIBUS DP backplane. Rated for 24 V DC with a max current consumption of 170 mA and typical draw of 100 mA. Width of 160 mm is the defining panel dimension; make sure the DIN rail slot is reserved accordingly. The depth is 59 mm and height 130 mm.