The Siemens 6ES7922-3BJ00-0BA0 is a pre-assembled front connector MTA (Marshalling Terminal Assembly) designed specifically for SIMATIC S7-300 systems in PCS7 process control environments. It carries 40 poles across an 8-meter round cable, terminated at the field end with a connector strip and at the enclosure with a screw-type terminal block. Rated at 24 V with a maximum of 30 V, it handles analog signal transmission only — no digital signals pass through this cable assembly.
The 40 poles match the front connector of the SIMATIC S7-300 (order code 6ES7392-1AM00-0AA0) on one end and a 25-pin D-SUB socket for ET200M on the other. That 24 V rated / 30 V maximum is the signal voltage for the analog channels — not a power supply rail. The 0.5 mm² conductor cross-section is sized for the low-current analog loops typical of PCS7 MTA wiring, not motor circuits. The cable sheath is black PVC, 7.6 mm outer diameter for the bundled single cores. That covers most indoor control-room and cabinet environments but not extended outdoor or washdown zones.