The Siemens 6ES7923-5BG50-0EB0 is a pre-assembled round cable purpose-built for SIMATIC S7-300 and S7-1500 systems, connecting a 4 × 16-pole front connector module on the I/O card side to a 50-pole connection module in the cabinet. It carries 50 conductors at 0.14 mm² each, rated for 24 V nominal and a maximum of 60 V, making it a straight match for digital I/O modules — not analog signal paths. The 6.5 m wire length gives enough reach to route from the rack to a remote terminal block in a standard-sized panel without splicing.
The 50-pole count at the connection module end and 16 poles per interface at the front connector end match the standard 32-channel digital I/O modules — each channel uses one conductor, with the remaining conductors handling commons and shields. Rated at 24 V with a 60 V maximum, this cable handles the typical 24 VDC control voltage used across S7-300 and S7-1500 digital input and output cards without margin concerns. The 10.3 mm outer diameter and PVC sheath mean it fits through standard cable ducts and gland plates, though the 50-conductor bundle is stiff — plan for a minimum bend radius consistent with a round cable of that gauge.