What it is and where it fits
The Siemens 6ES7923-5BF00-0EB0 is a pre-assembled round cable that connects a 4 x 16-pole front connector module to a 1 x 50-pole connection module, using IDC connectors on both ends. It is designed for SIMATIC S7-300 and S7-1500 systems, specifically for digital I/O modules. The cable is unshielded, with a PVC sheath, 50 conductors of 0.14 mm² each, and a length of 5 m.
Key ratings and what they mean for fit
Rated at 24 V and with a maximum of 60 V, this cable handles the standard 24 VDC control voltage used across S7-300 and S7-1500 digital I/O modules, with headroom for transient peaks up to 60 V. The 50-pole connection module interface and 32-channel support mean it mates directly to a 50-pin I/O module or terminal block, carrying all 32 signals plus commons in one harness. The 5 m length is a fixed assembly — no field cutting or re-termination — so verify your cabinet layout allows that run between the front connector and the connection module.
Deployment context
This cable is a panel-internal wiring assembly for S7-300 and S7-1500 racks. The round cable design (10.3 mm outer diameter) and PVC sheath suit fixed installation in control cabinets where flexibility is not a daily requirement. The IDC connectors terminate quickly without special tooling beyond a standard IDC press, which speeds up panel build versus hand-terminating 50 individual conductors.