Glossary · Automation fundamentals, platforms and components
One-cable technology
Also known as: Single-cable technology, One cable technology (OCT)
German: Ein-Kabel-Technologie
In drive technology, one-cable technology is a connection concept in which motor power and encoder feedback signals are carried in a single hybrid cable between servo drive and motor, instead of separate power and feedback cables.
- Automation components
In one sentence
One-cable technology carries motor power and encoder feedback in a single hybrid cable between servo drive and motor.
Example
A packaging machine's servo axes use one-cable technology, which halves the number of cables in the drag chains.
How it applies
- Engineering: One-cable systems rely on digital encoder protocols designed for this use, with the encoder signal transmitted over wires in the power cable. Cable type and maximum length must match the vendor's specification.
- Commissioning: Encoder communication errors often trace back to wrong cables, connectors or shield connection.
- Documentation: Specify the approved cables, maximum lengths and shielding requirements. Replacement instructions should warn against using standard power cables.
- Maintenance: Worn hybrid cables in drag chains cause both power and feedback faults, so they are inspected together.
One-cable vs. two-cable connection
Two-cable systems separate power and feedback, which is more tolerant of cable choice but increases cabling effort. One-cable systems save space and installation time but depend on matching drive, motor and cable.