What it is and where it fits
The Siemens 6ES7923-5BE00-0EB0 is a pre-assembled round cable designed to connect the front connector module of a SIMATIC S7-300 or S7-1500 system to a 50-pole connection module. It bridges a 4 m gap between a 4 × 16-pole front connector on the I/O card side and a single 50-pole connector on the remote module, using IDC connectors at both ends. This cable is specifically intended for digital I/O signals — it carries 50 conductors at 0.14 mm² each and is not rated for analog signal transmission.
Key ratings and what they mean for fit
Rated at 24 V with a maximum of 60 V, this cable handles the standard 24 VDC digital I/O signals used across the S7 family. The 60 V ceiling means it can tolerate the small voltage spikes common on long field-wire runs without derating — useful when the cable shares a wireway with higher-voltage circuits. The 0.14 mm² conductor cross-section is sized for signal-level current (typically 10–20 mA per channel on S7 digital modules), not for power distribution. With 32 channels and 50 conductors, the cable maps a full 32-channel digital I/O module plus spare conductors for shield or commons. The round cable design (10.3 mm outer diameter, PVC sheath) is unshielded, so it is suited for clean control-panel environments rather than high-EMI zones like drive cabinets. Operating temperature range is 0 to 60 °C; storage range is -30 to +70 °C.