EJxxxx - dimensions
The EJ modules are compact and lightweight thanks to their design. Their volume is approx. 50% smaller than the volume of the EL terminals. A distinction is made between four different module types, depending on the width and the height:
Module type  | Dimensions (W x H x D)  | Sample in figure below  | 
|---|---|---|
Coupler  | 44 mm x 66 mm x 55 mm  | EJ1100 (ej_44_2xrj45_coupler)  | 
Single module  | 12 mm x 66 mm x 55 mm  | EJ1809 (ej_12_16pin_code13)  | 
Double module  | 24 mm x 66 mm x 55 mm  | EJ7342 (ej_24_2x16pin_code18)  | 
Single module (long)  | 12 mm x 152 mm x 55 mm  | EJ1957 (ej_12_2x16pin_extended_code4747)  | 

The technical drawings can be downloaded from the Beckhoff homepage. The drawings are named as described in the drawing below.
