Pre-assembled cable for SIMATIC S7-300 / S7-1500
The Siemens 6ES7923-5BA50-0EB0 is a pre-assembled round cable that connects a 4 × 16-pole front connector module to a 1 × 50-pole connection module, purpose-built for SIMATIC S7-300 and S7-1500 digital I/O modules. It carries 50 conductors at 0.14 mm² each, terminated with IDC connectors at both ends, and is rated for 24 V with a maximum of 60 V. The 0.5 m length suits cabinet wiring where the I/O module and connection module sit within the same panel row.
What the ratings mean for fit
The 50-pole IDC connector on the connection-module side and the 4 × 16-pole (16 poles each, four sets) on the front-connector side define the physical interface — this cable is not a generic 50-pin ribbon; it mates specifically to the Siemens front connector module and the 50-pole connection module for S7-300/1500 systems. The 0.14 mm² conductor cross-section and 0.5 m length are fixed; you cannot cut or re-terminate the IDC ends in the field. The 32-channel suitability means it handles a full 32-point digital input or output module in one harness, keeping the cabinet wiring clean.