The Siemens 6ES7922-3BF00-0UB0 is a 20-pole front connector with a 5 m multi-conductor cable, terminated in screw-type terminals at the module end. It is designed exclusively for SIMATIC S7-300 digital I/O modules — the screw version mates with the 20-pole receptacle 6ES7392-1AJ00-0AA0 on the module face. Each of the 20 cores is numbered consecutively from 1 to 20, color-coded blue with a PVC sheath (RAL 5010), and individually rated at 0.5 mm² (AWG 20). The cable assembly carries a maximum voltage rating of 30 V, with a nominal operating voltage of 24 V — typical for the S7-300 backplane bus and digital I/O signal levels.
The 5 m cable length gives flexibility for routing from the S7-300 rack to a field termination point, but the bundled single-core design (2.2 mm outer diameter per core) means the full 20-conductor bundle has a noticeable thickness — plan for adequate cable duct space. The screw-type terminals on the connector accept 0.5 mm² wire; no ferrule is required but stranded wire should be twisted before insertion.