The Siemens 6ES7923-0BF00-0DB0 is a pre-assembled shielded round cable, purpose-built to connect SIMATIC S7-300 and S7-1500 front connector modules to remote connection modules. It carries 16 conductors at 0.14 mm² each, terminated at both ends with IDC connectors, and runs 5 m between the two interfaces. Rated at 24 V with a maximum of 60 V, the cable handles both digital and analog signal transmission, supported by a braided shield for noise immunity in the cabinet. The PVC sheath, 7 mm outer diameter, is rated for operation from 0 to 60 °C and storage from -30 to +70 °C.
The 24 V rated value and 60 V maximum tell you this cable is designed for the standard 24 VDC control voltage used across S7-300 and S7-1500 I/O modules, with headroom for transient peaks. The 0.14 mm² conductor cross-section is typical for digital input and output signals at these voltages; it is not sized for power distribution or high-current loads. The 16-pole IDC connectors at both ends match the pin count of the standard 40-pin front connector module's cable-side interface, but note that only 16 of the 40 available positions are wired. The braided shield is critical for analog signal integrity — without it, 4-20 mA loops or thermocouple inputs would pick up switching noise from adjacent digital channels.