The Siemens 6ES7922-3BF00-0AG0 is a 40-pole front connector with pre-wired single cores, purpose-built for SIMATIC S7-300 digital I/O modules. It comes with 40 individual H05V-K conductors, each 0.5 mm², bundled in a blue PVC sheath and terminated with crimp connections at the module end. The cable run is 5 m, giving you reach from the module to a field junction box or terminal strip without a splice.
Rated at 24 V with a maximum of 30 V, this connector is matched to the signal levels of standard S7-300 digital I/O modules — 24 VDC is the typical field-side supply for sensors and actuators in that platform. The 30 V ceiling means it handles the occasional 28.8 V power supply tolerance without derating. The 40 poles map directly to the 40-pin front connector receptacle on modules like the SM 321 and SM 322; each core is numbered consecutively from 1 to 40 at the white adapter contact, so you can trace field wiring back to the module channel without a breakout diagram.
Deployment context
This is a wiring-side accessory for S7-300 racks — it snaps into the front of the module and terminates field cables via crimp contacts. The 5 m cable length suits panel layouts where the I/O module sits in a central rack and the field wiring lands on a nearby terminal block; you get enough slack to route through a cable duct without a mid-span junction. The blue sheath and RAL 5010 color coding match Siemens' standard I/O cabling scheme.