The Siemens 6ES7923-5BC50-0CB0 is a pre-assembled round cable that links the front connector module of a SIMATIC S7-1500 digital I/O module to a connection module, carrying 50 signal conductors over a 2.5 m length. It uses IDC connectors at both ends — the cable-side front connector module and the connection module — so the termination is factory-crimped, not field-wired. Rated for 24 V nominal with a maximum of 60 V, it supports 32 channels of digital signal transmission (analog transmission is not supported per the spec). The cable sheath is black PVC, 10.3 mm outer diameter, with 0.14 mm² conductors.
The product status is listed as Active (mature stage), meaning Siemens continues to manufacture and support this cable for new and existing S7-1500 installations. No end-of-life notice or successor part is recorded.
The 50-pole count at both interfaces matches the standard front connector on S7-1500 digital I/O modules (32-channel modules typically use a 40-pin connector, but 50-pole cables exist for modules with higher density or for connection modules that aggregate multiple I/O groups). The 24 V rated value aligns with the nominal voltage of S7-1500 digital inputs and outputs; the 60 V maximum gives headroom for 48 VDC field devices or for applications where the cable shares a raceway with higher-voltage signals, though the cable is unshielded, so it is not intended for analog or noise-sensitive paths. The 2.5 m length is a standard reach from the I/O module to a connection module mounted on the same DIN rail or in the same cabinet section — long enough for most single-panel layouts, short enough to avoid excessive voltage drop at 0.14 mm² conductor cross-section.