Pre-assembled cable for SIMATIC S7-300/1500 digital I/O
The Siemens 6ES7923-0BC00-0CB0 is a pre-assembled round cable that connects a front connector module to a connection module on SIMATIC S7-300 or S7-1500 systems. It is unshielded, 2 m long, and uses IDC connectors at both ends, carrying 16 conductors with a cross-section of 0.14 mm² each. Rated for 24 V and tested to a maximum of 60 V, it is designed specifically for digital I/O modules — not for analog signal transmission.
What the ratings mean for fit
The 24 V rated value matches the standard control voltage on S7-300/1500 backplanes and digital I/O modules. The 60 V maximum is the insulation rating — the cable can handle signal peaks or short-term overvoltage without breakdown, but it is not a power cable. The 2 m length is fixed; there is no field-cut option because the IDC connectors are factory-terminated. The 16-pole, 8-channel configuration means one cable serves one 8-channel digital I/O module, with each conductor carrying a single digital signal (24 V sensor/actuator or PLC output).
Deployment context
This cable runs between the front connector on an S7-300/1500 I/O module and a separate connection module mounted in the same enclosure. The round, black PVC sheath (6.5 mm outer diameter) is flexible enough for routing in a control cabinet but unshielded, so keep it away from variable-frequency drive output cables or other high-noise sources. Operating temperature range is 0 to 60 °C; storage range is -30 to +70 °C.