What it is and where it fits
The Siemens 6ES7923-0CD00-0BA0 is a round-sheath ribbon cable designed specifically for SIMATIC S7-300 and S7-1500 systems. It carries 16 cores at 0.14 mm² each, runs 30 m, and is shielded with a braided shield — so it handles both digital and analog I/O signals without picking up line noise. The 10.5 mm outer diameter and black PVC sheath make it a standard pull-through cable for cabinet trunking or cable ducts.
Key ratings and what they mean for fit
Rated at 24 V with a maximum of 60 V, this cable is sized for the 24 VDC control voltage typical of S7-300/1500 I/O modules — the 60 V ceiling covers any short overvoltage transient without derating the insulation. The 30 m length is the standard reach from a central rack to a remote I/O station or junction box; if your layout exceeds that, you need a repeater or a different cable assembly. With 16 poles and 8 channels, each core maps to one signal pair (plus shield drain) for an 8-channel digital or analog module. The coded-wire marking means each core is individually identified along the run, which saves time during termination and troubleshooting. The braided shield gives 85–95% coverage, sufficient for analog signal integrity in industrial environments with moderate EMI. For high-noise drives or inverter cabinets, you may want an additional foil-shielded cable, but for general-purpose I/O this is the standard choice.
Compliance and approvals
The cable carries the reference code W per IEC 81346-2, which aligns with standard cabinet labelling. No UL, CSA, or CE marking is explicitly listed in the available documentation, but as a Siemens SIMATIC accessory it is designed to meet the applicable EN and IEC standards for the target system. For a compliance audit, the manufacturer's declaration of conformity for the S7-300/1500 system covers this cable as a system component.