What this front connector does in the cabinet
The Siemens 6ES7922-4BC50-0AE0 is a 48-pole front connector built for the SIMATIC S7-400 family, specifically the MS, MSP, and MR units that take the 6ES7492-1CL00-0AA0 mating connector. It strips out 46 individually numbered single cores — 0.5 mm² each, H05V-K PVC, blue sheath — over a 2.5 m run, ready for crimp termination at the field end. That 46-channel count matches the I/O density of a typical S7-400 digital input or output card, so one connector handles a full module's worth of signals without daisy-chaining.
The cable assembly is rated at 24 V nominal with a 30 V maximum — that's the insulation and core-to-core voltage limit, not a switching rating. For a 24 VDC digital I/O bus in an S7-400 rack, that's exactly the working voltage the module sees. The 0.5 mm² conductor cross-section (roughly 20 AWG) is sized for signal-level currents typical of PLC digital inputs and outputs; don't plan on pulling solenoid or contactor coil power through it. The cores are consecutively numbered from 3 to 48, matching the pin assignment on the 48-pole connector, so the wireman can land them straight into a terminal block without ringing out each one.