The 6ES7923-0CD00-0AA0 is a round-sheath ribbon cable, 30 m long with 16 cores of 0.14 mm² each, designed to connect digital I/O modules in a SIMATIC S7-300 or S7-1500 system. It carries 8 channels of digital signals — no analog transmission — at a rated 24 V and a maximum of 60 V. The PVC sheath is black, 9.5 mm outer diameter, with coded-wire core marking for field termination.
Rated at 24 V and good for up to 60 V, this cable matches the signal level of standard S7-300 and S7-1500 digital input and output cards. The 30 m length covers most cabinet-to-field-device runs without a splice — useful when your I/O rack sits centrally and the sensors or actuators are distributed along a line. The 16 conductors (8 channels, each with a return) mean one cable handles a full 8-point module; you don't need a second pull for the commons. Coded-wire marking speeds up termination and reduces the chance of a swapped signal during commissioning.