The Siemens 6ES7922-3BC50-0AC0 is a pre-wired front connector for SIMATIC S7-300 I/O modules, carrying 40 individual cores terminated in screw-type terminals at the module end and stripped single cores at the field end. It mates with the 6ES7392-1AM00-0AA0 connector housing on the module face. Rated for 24 V and a maximum of 30 V, with each core at 0.5 mm² cross-section and the full bundle running 2.5 m to the field device. The cable is blue PVC-sheathed H05V-K, cores numbered 1 through 40 — no guesswork on termination. Designed specifically for digital I/O modules; not suited for analog signal transmission. The screw-type terminal block on the enclosure side gives a solid mechanical connection for panel wiring that stays put under vibration.
No rewiring or adapter needed — it mates directly to the standard S7-300 40-pin header.
The 30 V maximum rating covers the 24 V nominal supply common on S7-300 racks, with headroom for ripple or a 28.8 V power supply. The 0.5 mm² conductor cross-section is standard for digital signal wiring in control panels — fine for 24 VDC sink/source inputs and outputs up to the module's rated current per channel. Operating temperature range of 0 to 60 °C and storage range of -30 to +70 °C cover typical cabinet conditions. The blue sheath (RAL 5010) is the standard Siemens color for 24 VDC wiring in their systems — helps with panel identification at a glance.