The Siemens 6ES7922-3BF00-0UC0 is a 40-pole front connector with a 5 m multi-norm braided cable, designed specifically for SIMATIC S7-300 digital I/O modules. It terminates with screw-type terminals on the enclosure side and delivers 40 individually numbered single cores (0.5 mm², PVC sheath, blue) for field wiring. The 24 V rated value (30 V maximum) matches the standard S7-300 backplane voltage for digital signals — analog signal transmission is not supported, so reserve this for discrete I/O only.
The 40 poles match the standard 40-pin front connector interface (mate: 6ES7392-1AM00-0AA0) used across S7-300 digital input and output modules. The 0.5 mm² conductor cross-section (AWG 20) is adequate for typical 24 V DC digital signals at the rated 24 V; the 30 V maximum is a ceiling for transient protection, not a continuous operating target. The 5 m cable length gives enough reach for most cabinet-to-field-device runs without a junction box, but if your panel layout demands longer tails, plan for an intermediate terminal strip.