What this pre-assembled cable does for an S7-300 rack
The Siemens 6ES7922-3BJ00-0AS0 is a pre-assembled front connector MTA cable that bridges a 40-pole front connector on a SIMATIC S7-300 I/O module to a 50-pole D-sub socket on an ET 200M distributed I/O station. It carries both analog and digital signals, so one cable handles mixed I/O types without separate wiring runs.
8 m round cable, 40 poles, screw terminals
Length is 8 m — enough to reach from a panel-mounted S7-300 rack to a remote ET 200M node without a junction box. The cable is round, black PVC sheath, 9.8 mm outer diameter, with 0.5 mm² conductors. On the enclosure side it terminates in a screw-type terminal block; in the field it connects via a connector strip. Rated at 24 V nominal, maximum 30 V, so it stays within the SELV limits typical for S7-300 I/O backplanes.
