What it is and where it fits
The Siemens 6ES7922-4BD20-0AD0 is a pre-wired front connector for SIMATIC S7-400 I/O modules. It mates with the 48-pin receptacle on the module face (order code 6ES7492-1AL00-0AA0) and brings out 46 individually numbered single cores, each 0.5 mm² cross-section, terminated in screw-type terminals on the enclosure side. The cable bundle runs 3.2 m, sheathed in blue PVC, with a 2.2 mm outer diameter per core.
What the ratings mean for fit
Rated at 24 V and tested to a maximum of 30 V, this connector is sized for the 24 VDC digital I/O bus typical of S7-400 racks. The 46 channels match the channel count of 48-pin I/O modules (two pins are reserved for module keying or shield termination). The 0.5 mm² conductor cross-section carries the signal-level currents of digital inputs and outputs without significant voltage drop over the 3.2 m run. Screw-type terminals on the enclosure end accept solid or ferruled stranded wire up to the module's terminal capacity — no special crimp tool required for field termination.
Sourcing and lifecycle
The product status is active, so this order code is the current production variant for new S7-400 builds and replacement connectors. It is quoted to order against an RFQ. The core numbering scheme (3 to 48, white adapter contact) matches the standard S7-400 wiring convention, so a panel wired to earlier 48-pin connectors can drop this in without re-terminating the field wiring.
Environmental and compliance
Operating temperature range is 0 to 60 °C; storage range is -30 to +70 °C. The cable jacket is PVC (H05V-K rated), suitable for fixed installation inside control cabinets. The blue sheath (RAL 5010) is the standard colour for 24 VDC wiring in IEC 81346-2 schemes (reference code WG).