This is a factory-terminated front connector for SIMATIC S7-300 digital I/O modules — the 40-pole crimp version (6ES7922-3BC50-0AG0) with 40 single cores of 0.5 mm² H05V-K wire, each numbered consecutively from 1 to 40 in white for straightforward field termination. The cable runs 2.5 m from the connector body to the bare ends, so it reaches a standard DIN-rail terminal block inside the same enclosure without a splice. Rated at 24 V with a maximum of 30 V, it is sized for the 24 VDC control voltage typical of S7-300 digital input and output modules. The connector body mates with the 40-pin receptacle on the module face (6ES7921-3AH20-0AA0), and the crimp termination at the module end means you push the cores into the cage clamp — no screwdriver needed on the connector itself.
The 24 V rated value and 30 V maximum are the voltage limits for the signal wiring inside the cable sheath — not a power rating. The 0.5 mm² conductor cross-section handles the typical 10–20 mA per channel of S7-300 digital I/O without voltage drop over the 2.5 m run. The blue PVC sheath (RAL 5010) and numbered cores make panel wiring traceable back to the module channel. The 40 poles match the full channel count of a 32-channel digital I/O module plus the预留 pins for the module's internal bus and power supply. The crimp connection at the module end is the standard for S7-300 — no soldering, no screw terminals on the connector body itself.