Dimensions & Mechanical Fit
Dimensions: 125 x 21.6 x 40.9 mm (height x width x depth) — fits on the standard S7-300 DIN-rail mounted module. Tightening torque specification for the screw terminals is 0.4–0.7 Nm. Ambient operating temperature range: 0 to 60 °C.
This front connector is not a functional cross-match for the 6ES7 193-4CC30-0AA0 terminal module, nor for the 3RK1922-2BA00 backplane bus modules; those serve different mechanical and electrical roles.