The Siemens 6ES7923-5BJ00-0EB0 is a pre-assembled round cable purpose-built for wiring SIMATIC S7-300 and S7-1500 systems to remote I/O connection modules. It runs 8 m unshielded, with 50 conductors of 0.14 mm² each, terminated at both ends with IDC connectors — one end splits into four 16-pole front connector headers, the other lands on a single 50-pole connection module. Rated for 24 V operation with a maximum of 60 V, this cable is designed for digital signal transmission only — no analog signals. The 32-channel count matches the typical I/O density of a single SM 32DI or 32DO module, so one cable per module is the standard layout. The PVC sheath, 10.3 mm outer diameter, is black and rated for operation from 0 to 60 °C, storage from -30 to +70 °C.
The 8 m length covers most cabinet-to-machine distances in a single run without a junction box. The IDC connectors on both ends punch down onto the module's pin headers — no screw terminals, no ferrule crimping. At the I/O module side, the four 16-pole headers plug into the front connector of a 32-channel digital I/O card; at the field side, the 50-pole connection module provides a connector strip for field wiring. The round cable profile (10.3 mm OD) fits standard cable glands and cable carriers.